Titanium

Titanium is a corrosion-resistant metal with low density and high strength. The corrosion resistance of titanium results from a hard oxide coating that forms upon exposure to air. This coat protects the underlying metal and is resistant to most dilute acids. Although titanium is a strong metal in pure form, it becomes much stronger when alloyed with other metals. Its high strength-to-weight ratio makes titanium components useful for aerospace and military applications. It is also used to make orthopedic implants, dental implants, and medical prostheses. A major detractor in the use of titanium is its relatively high cost, but these costs are acceptable for the applications in which titanium is used.