TB5 Titanium
TB5 titanium alloy (Ti-15V-3Cr-3Sn-3Al) is a metastable β-type alloy featuring excellent cold rolling and cold forming capabilities, with deformation exceeding 90%. It is suitable for forming moderately complex sheet metal parts at room temperature and for superplastic forming above 700°C. After aging treatment, the alloy achieves tensile strengths over 1080 MPa and offers outstanding weldability. TB5 is used to manufacture sheet metal components and fasteners, meeting the requirements for high structural efficiency, production speed, and cost-effectiveness. It performs well up to 200°C in the solution-treated condition and up to 290°C after aging. TB5 has been successfully applied in fighter jets and satellites, significantly reducing weight—for example, replacing 30CrMnSiA steel in parachute beam structures reduced weight by 1.13 kg (28.6%).
Chemical Composition
|
Ti |
Fe |
C |
N |
H |
O |
AL |
Sn |
V |
Cr |
|
|
Min |
Rem |
- |
- |
- |
- |
- |
2.5 |
2.5 |
14 |
2.5 |
|
Max |
0.25 |
0.05 |
0.05 |
0.015 |
0.13 |
3.5 |
3.5 |
16 |
3.5 |
Material Properties
|
Minimum Mechanical Properties of the Alloy at Room Temperature |
||
|
Tensile Strength |
Yield Strength |
Elongation |
|
Rm N/mm2 |
Rp0.2 N/mm2 |
A5% |
|
709 |
690 |
10% |
Feature
TB5's composition is meticulously designed to optimize its properties. The alloy is titanium - based, with key elements strategically chosen to stabilize the β phase and enhance performance. Vanadium (3.5 - 4.5%) stabilizes the β phase, while aluminum (2.0 - 3.0%) strengthens the alloy and balances strength with ductility. Chromium (1.0 - 2.0%) boosts corrosion resistance and mechanical properties, and iron (0.5 - 1.5%) acts as a solid - solution strengthener. This precise elemental mix, combined with heat treatment, enables the alloy to achieve peak performance.
After appropriate heat treatment, TB5 exhibits outstanding mechanical properties. With solution and aging treatment, it achieves a tensile strength of 1100-1400 MPa and a yield strength of 1000-1300 MPa, placing it among the ranks of high-performance titanium alloys. It also offers an elongation at break of 8-12%, facilitating processes such as rolling and forging. Additionally, TB5 demonstrates excellent fatigue resistance, making it suitable for aerospace components subjected to cyclic loading. Moreover, it maintains its strength at temperatures up to 300°C, allowing for application in various moderate-temperature environments.
Applications
① Aerospace Structures
Aircraft fuselage skins (replaces aluminum in some stealth aircraft)
Wing flaps, landing gear components
Spacecraft cryogenic fuel tanks
② Defense & Military
Missile casings (high strength/weight for kinetic penetration)
Armor plating (lightweight ballistic protection)
③ Automotive Racing
High-performance suspension springs (replaces steel with 60% weight savings)
Formula 1 gearbox components
④ Medical Devices
Orthopedic trauma plates (when MRI compatibility is required)
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