Titanium Gr5 (TC4) is the most widely used titanium grade. It is a two phase a+ß titanium alloy, with aluminum as the alpha stabilizer and vanadium as the beta stabilizer. This high-strength alloy can be used at cryogenic temperatures to about 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is used in the annealed condition and in the solution treated and aged condition. Some applications include: compressor blades, discs, and rings for jet engines; airframe and space capsule components; pressure vessels; rocket engine cases; helicopter rotor hubs; fasteners; critical forgings requiring high strength-to-weight ratios.