A dark-gray or silvery, very hard, light metallic element, occurring combined in various minerals; symbol Ti. Atomic number 22; atomic weight 47.88; melting point 1,675°C; boiling point 3,260°C; specific gravity 4.54 at 20°C. It is used in metallurgy to remove oxygen and nitrogen from steel and to toughen it.
It was originally discovered by the English clergyman William Gregor in the mineral ilmenite (FeTiO3) in 1791. It was rediscovered in 1795 by the German chemist Martin Heinrich Klaproth, who called it titanium because it had no characteristic properties to use as a name; from Titan + -ium.
Titan, loan from Fr., as above.
titanium oxide, TiO
Fr.: oxide de titane