Titanium and Its Alloys - Alloplastic implant materials
These have been used primarily for their corrosion resistance and biocompatibility. Titanium exists in nature as a pure element with an atomic number 22 and atomic weight of 47.9. Titanium composes about 0.6 % of the earths crust and is a million times more abundant than gold. This metal exists as rutile (TiO2 ) or Ilmenite (FeTiO3 ) and requires special extraction methods to be recovered in the elemental state.