"Titanium's physical qualities of high strength, toughness, durability, low density, corrosion resistance and biological compatibility make it useful in a variety of applications. Discovered in the late 1500's, titanium was named for the mythological giants, the Titans. In the 1940's, it was used by the space and defense industries. Today, titanium is used in aerospace applications, automobiles, prosthetics, buildings, and sporting equipment." (Quoted from article)