Titanium 15V-3Cr-3Sn-3Al, commonly known as Ti-15-3-3-3, is a metastable beta-titanium alloy developed to provide exceptional cold formability in the solution-treated condition and extremely high strength after aging.
It was specifically designed to overcome the forming limitations of alpha-beta titanium alloys such as Ti-6Al-4V and is one of the most widely used sheet-form beta titanium alloys in aerospace structures.
Key Mechanical Properties (Aged Condition)
| Property | Typical Value |
|---|---|
| Tensile Strength | 1,200 – 1,400 MPa |
| Yield Strength | 1,050 – 1,200 MPa |
| Elongation | 6 – 12% |
| Elastic Modulus | ~100 – 105 GPa |
| Hardness | ~360 – 420 HV |
Strengthening & Metallurgical Behavior
Ti-15-3-3-3 is strengthened primarily through precipitation of fine alpha phase particles within a beta matrix during aging.
Typical processing sequence:
✔ Solution treatment → fully beta structure
✔ Cold forming (optional)
✔ Aging → fine alpha precipitation
This sequence allows parts to be formed easily first and then strengthened to very high levels afterward, ensuring excellent dimensional control and minimal springback.
Key Characteristics
✔ Fully beta alloy at room temperature
✔ Outstanding cold formability (best among titanium alloys)
✔ Very high strength after aging
✔ Excellent fatigue and fracture resistance
✔ Good corrosion resistance
✔ Superior performance in thin sections
Limitations include reduced oxidation resistance at high temperature and service temperature limits of approximately 300–350 °C.
Available Forms
Sheets & plates (most common)
Foils
Bars & rods
Extrusions
Precision aerospace components
Applications
Aerospace structural sheets
Fuselage and wing components
Clips, brackets, and fittings
Honeycomb face sheets
Space and defense lightweight panels
High-performance industrial formed parts
Why Choose Titanium 15V-3Cr-3Sn-3Al?
✔ Exceptional cold formability before aging
✔ Very high strength after heat treatment
✔ Reduced manufacturing and forming cost
✔ Excellent strength-to-weight ratio
✔ Ideal for complex aerospace sheet components
Ti-15-3-3-3 is selected when components must be easily formed first and then made extremely strong afterward, making it a preferred aerospace beta-titanium alloy.