Titanium 8Al-1Mo-1V, commonly known as Ti-8-1-1, is a near-alpha titanium alloy specifically developed for high-temperature aerospace applications where creep resistance and long-term thermal stability are critical.
This alloy bridges the performance gap between commercially pure titanium and alpha-beta alloys such as Ti-6Al-4V, delivering superior elevated-temperature performance while maintaining good fabricability.
Alloy Classification & Composition
| Category | Details |
|---|---|
| Alloy Type | Near-Alpha Titanium Alloy |
| Primary Alloying Elements | Aluminum (Al), Molybdenum (Mo), Vanadium (V) |
| Strengthening Mechanism | Solid-solution strengthening & grain stability |
Typical Mechanical Properties (Annealed)
| Property | Typical Value |
|---|---|
| Tensile Strength | 900 – 1,000 MPa |
| Yield Strength | 800 – 900 MPa |
| Elongation | 10 – 14% |
| Density | ~4.50 g/cm³ |
High-Temperature Performance
Ti-8-1-1 is engineered for sustained exposure to elevated temperatures, offering excellent creep resistance and microstructural stability up to approximately 450–500 °C.
✔ Superior creep resistance under continuous load
✔ Maintains dimensional stability during prolonged service
✔ Better thermal stability than alpha-beta titanium alloys
✔ Resistant to grain growth and phase degradation
Corrosion & Environmental Resistance
The alloy exhibits excellent oxidation resistance at moderate high temperatures and strong resistance to salt stress corrosion.
Like all titanium alloys, it forms a stable, self-healing oxide layer that ensures long-term durability in marine, atmospheric, and aerospace environments.
Fabrication & Processing Characteristics
✔ Good forgeability compared to fully alpha alloys
✔ Typically processed by forging followed by annealing
✔ Not heat-treatable for strength – properties controlled by processing
✔ Good weldability with inert gas shielding
✔ Minimal post-weld property degradation
Applications of Titanium 8Al-1Mo-1V
Jet engine casings
Compressor cases
Engine mounts
Afterburner components
Hot airframe structures
Missile and high-temperature defense structures
Why Choose Titanium 8Al-1Mo-1V?
✔ Excellent creep resistance at elevated temperatures
✔ Outstanding thermal stability for long service life
✔ Lightweight alternative to steels and superalloys
✔ Aerospace-proven alloy with decades of service history
✔ Ideal where Ti-6Al-4V cannot meet temperature requirements
Titanium 8Al-1Mo-1V is the preferred choice for hot-section aerospace components where reliability, thermal stability, and long-term performance are more important than maximum room-temperature strength.