Titanium Alloy
Titanium has a density that is 56% that of steel and with equivalent strength. Its strength-to-weight ratio is greater than any other engineering material. There are several classes of titanium alloys: commercially pure alloys, where oxygen is the primary alloying element, are low-to-medium strength alloys primarily used for corrosion resistant applications; Alpha, Alpha-Beta and Beta alloys are medium- to high-strength titanium alloys with various combinations of typically aluminum, vanadium, tin, molybdenum, zirconium and chrome. Common examples are Ti-6Al-4V and Ti-3Al-2.5V.