Titanium Alloy 6-4 (Ti-6Al-4V) — Properties, Applications, and Global Supply

Introduction

Daxun Alloy is an experienced manufacturer and supplier of high-performance titanium and titanium alloys in China, specializing in the production and research and development of titanium alloys. Leveraging decades of experience, we provide high-performance titanium and titanium alloys, medical titanium alloys, and corrosion-resistant titanium alloy solutions to customers worldwide. Our Ti-6Al-4V products are engineered to combine exceptional strength, corrosion resistance, and biocompatibility, making them ideal for demanding applications in the aerospace, medical, chemical, and industrial sectors.

Ti-6Al-4V, commonly known as 6-4 titanium alloy, is an α+β phase alloy with a balanced combination of high tensile strength, low density, and excellent corrosion resistance. These properties make it the most widely used titanium alloy in aerospace components, medical implants, industrial machinery, and marine equipment.

In this article, our experienced engineers provide a detailed technical overview of titanium alloy 6-4, highlighting its applications, explaining why Daxun Alloy is a trusted supplier, and answering frequently asked questions from customers and engineers.

DAXUN ALLOY provides a full range of titanium product forms, including:

• Titanium sheets (plates) for aerospace structures, chemical equipment, and industrial panels
  Titanium pipes for high-performance chemical and marine pipelines
• Titanium bars for machining medical implants, aerospace components, and industrial machinery
  Titanium wires for specialty fasteners, coils, and springs
  Titanium forgings for critical aerospace parts and high-strength structures

Our products combine superior performance, consistent quality, and precise engineering, making DAXUN ALLOY a trusted supplier for clients worldwide.

Overview of Titanium Alloy Ti-6Al-4V

Ti-6Al-4V consists primarily of 6% aluminum and 4% vanadium, along with trace elements. The alloy demonstrates:

• High tensile strength: up to 950 MPa (annealed condition)
• Good fatigue resistance
• Excellent corrosion resistance in seawater, acidic, and alkaline environments
• Outstanding biocompatibility, suitable for medical implants
• Low density (approx. 4.43 g/cm³) for weight-sensitive applications

This combination of properties makes Titanium Alloy 6-4 ideal for aerospace titanium structures, medical devices, corrosion resistant titanium piping, and industrial components exposed to extreme environments.

Key Material Properties

Mechanical Properties

Chemical composition of 6-4 titanium alloy Table 1：

What Are the Mechanical Properties of Titanium Alloy 6-4? Table 2：

The Ti-6Al-4V alloy maintains high strength at both ambient and elevated temperatures up to 400°C, making it suitable for aerospace engines, heat exchangers, and high-strength fasteners.

What are the physical properties of 6-4 titanium alloy? Table 3

Thermal Properties

• Melting Point: 1604–1660°C
• Thermal Conductivity: 6.7 W/m·K
• Coefficient of Thermal Expansion: 8.6 × 10⁻⁶ /°C

The low thermal expansion and moderate conductivity make Titanium Alloy 6-4 ideal for precision engineering applications, including turbine blades, biomedical implants, and chemical processing equipment.

Corrosion Resistance（6-4）

Titanium Alloy 6-4 naturally forms a passive oxide layer, providing excellent resistance against seawater corrosion, oxidation, and many industrial chemicals. It is particularly resistant to:

• Saltwater and marine environments
• Chloride ions
• Organic and inorganic acids
• High humidity conditions

This makes corrosion resistant titanium a reliable material for offshore platforms, desalination plants, and chemical piping.

Biocompatibility

Medical-grade Ti-6Al-4V ELI (Grade 23) is widely used in orthopedic implants, dental devices, and surgical instruments due to:

• Low carbon content (≤0.08%)
• High fatigue resistance
• Excellent tissue compatibility
• Reduced risk of intergranular corrosion

Manufacturing and Processing

At DAXUN ALLOY, our Titanium Alloy 6-4 products are manufactured with strict quality control to ensure superior performance.

Melting and Casting

• Vacuum Arc Remelting (VAR)
• Electron Beam Melting (EBM)
• High-purity titanium ingots with controlled composition

Forging and Rolling

• Precision forging for aerospace and medical components
• Hot and cold rolling to produce sheets, bars, and plates
• Achieves excellent grain structure for enhanced mechanical properties
  

Machining

• CNC machining for complex aerospace titanium components
• Advanced milling and turning for medical titanium implants
• Custom tolerances and surface finishes for critical applications

Heat Treatment

• Solution treatment to enhance corrosion resistance
• Aging for high strength
• Maintains excellent fatigue and fracture resistance

Surface Finishing

• Polishing, pickling, and anodizing for both aesthetic and functional purposes
• Brushed and matte finishes available for decorative applications
• High-precision finishing for medical titanium implants and aerospace parts

Quality Control and Testing

• 1.Daxun Alloy utilizes advanced testing equipment to ensure consistent quality:
• 2.Ultrasonic testing, nondestructive testing, and PT testing
• 3.Mechanical testing to ensure tensile strength, hardness, and fatigue strength
• 4.Chemical analysis using a benchtop spectrometer
• 5.Dimensional inspection using a CNC coordinate measuring machine (CMM)
• 6.Nondestructive testing (NDT) of critical aerospace components
• These rigorous processes ensure that every batch of Titanium Alloy 6-4 meets or exceeds ASTM B265, ASTM B348, AMS 4928, and other international standards.

Applications of Titanium Alloy Ti-6Al-4V

Titanium Alloy 6-4 serves a wide range of industries:

• Aerospace
  Titanium Alloy 6-4 (Ti-6Al-4V, Grade 5 titanium) is extensively used in the aerospace industry due to its high specific strength, lightweight properties, and excellent corrosion resistance. It is commonly fabricated into titanium sheets, titanium plates, titanium bars, and titanium forgings for aircraft structural components, turbine blades, landing gear, and aerospace fasteners. For high-temperature or critical-load applications, Ti-6Al-4V ELI (Grade 23 titanium) may also be used, particularly in precision aerospace components and engine parts.
• Medical
  In the medical sector, Ti-6Al-4V ELI is preferred for its biocompatibility, high toughness, and low impurity content, making it ideal for orthopedic implants, dental implants, surgical instruments, and spinal devices. The material is often supplied as titanium bars, rods, wires, and forged components to allow precise machining and customization of implants. Commercially pure titanium (Grade 1 or Grade 2) is also used in non-load-bearing implants and surgical tools where maximum corrosion resistance is critical.
• Industrial and Chemical
  Titanium Alloy 6-4’s exceptional resistance to corrosion and high strength-to-weight ratio make it suitable for demanding industrial applications, including chemical pipelines, heat exchangers, pressure vessels, and reactor components. In particular, titanium tubes and pipes are widely used for high-performance heat exchangers, providing reliable corrosion resistance in aggressive chemical and seawater environments. The material is typically fabricated as titanium pipes, tubes, sheets, and plates to meet the needs of chemical, petrochemical, and high-temperature processing systems. Grade 12 titanium is sometimes employed in seawater-exposed chemical systems for enhanced corrosion protection.
• Marine and Offshore
  For marine and offshore applications, Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo are widely utilized in desalination systems, offshore platforms, and naval vessels. The material is supplied as titanium plates, sheets, pipes, and forgings, offering long-term corrosion resistance in seawater and structural reliability in harsh marine conditions.
• High-Performance Fasteners and Specialty Components
  Titanium Alloy 6-4 is also used in automotive, aerospace, and high-performance sports equipment for lightweight, high-strength fasteners, springs, and precision components. Products are often supplied as titanium wires, rods, and specialized titanium forgings, enabling custom solutions for springs, coils, bolts, and high-stress components where weight reduction and durability are critical.

DAXUN ALLOY Advantages

• Comprehensive manufacturing capabilities
• Single-source services for melting, forging, rolling, machining, heat treatment (STA), and finishing
• Advanced quality control
• Extensive industry experience
• Partnering with leading global aerospace, medical, and chemical companies
• Customization and flexibility
• Custom sizes, shapes, and finishes to meet customer specifications
• Reliable supply and fast delivery
• Ensure project completion on time with ample inventory and global shipping
• Technical expertise
• Dedicated R&D and engineering teams provide application support

Frequently Asked Questions (FAQ)

Q1: What makes Titanium Alloy 6-4 better than other titanium alloys?
A: Ti-6Al-4V offers the ideal balance of high strength, corrosion resistance, and biocompatibility. It is widely used in aerospace, medical, and marine applications due to its versatility.

Q2: Can Titanium Alloy 6-4 be welded easily?
A: Yes, with proper procedures, Ti-6Al-4V and Ti-6Al-4V ELI grades can be welded using TIG or electron beam welding while maintaining mechanical properties and corrosion resistance.

Q3: Is Titanium Alloy 6-4 suitable for marine applications?
A: Absolutely. Its excellent corrosion resistance in seawater makes it ideal for offshore platforms, desalination plants, and marine piping.

Q4: What certifications do you provide for Ti-6Al-4V?
A: DAXUN ALLOY provides full documentation, including mill test certificates (MTC), material composition reports, mechanical test certificates, and NDT reports as required.

Q5: Can you supply customized titanium components?
A: Yes, we specialize in custom dimensions, shapes, and surface finishes to meet client requirements for aerospace, medical, and industrial applications.

Conclusion

DAXUN ALLOY is a trusted global supplier of Titanium Alloy 6-4 (Ti-6Al-4V), delivering high-performance aerospace titanium, medical titanium, and corrosion resistant titanium solutions. Our expertise spans melting, forging, machining, heat treatment, and surface finishing, ensuring reliable quality for demanding industrial applications. With extensive experience in collaborating with global leaders and a commitment to customization, DAXUN ALLOY provides innovative, durable, and high-quality titanium products.

Whether you require titanium sheets, bars, pipes, or precision aerospace components, DAXUN ALLOY offers unparalleled technical expertise, quality control, and project support. Choose DAXUN ALLOY for high-strength, lightweight, and corrosion-resistant titanium solutions that exceed industry standards.

Author: David

David holds a Bachelor of Science in Mechanical Engineering and brings over 20 years of experience in the titanium alloy and advanced materials industries. Throughout his career, he has held senior roles at leading companies, including Daxun Alloys, global aerospace suppliers, and specialized metal fabricators, gaining extensive expertise in titanium alloy production, quality assurance, and industrial applications. His professional focus spans engineering processes, materials innovation, and international export markets, establishing him as a recognized authority in high-performance titanium alloy products for aerospace, medical, and industrial sectors.