Titanium is a chemical element with the symbol Ti and its atomic number is 22. It has a low density and is a strong, lustrous, corrosion-resistant transition metal with a silver color.In 1791, titanium was discovered by William Gregor in Cornwall, Great Britain, and named by Martin Heinrich Klaproth for the Titans of Greek mythology. The element presents within a number of mineral deposits, principally rutile and ilmenite, which are widely distributed in the Earth's crust and lithosphere, and it is found in almost all living things, rocks, water bodies, and soils. Titanium is extracted from its principal mineral ores via the Kroll process or the Hunter process. Its most common compound, titanium dioxide, is a popular photocatalyst and is used in the manufacture of white pigments. Other compounds include titanium tetrachloride, a component of smoke screens and catalysts; and titanium trichloride, which is used as a catalyst in the production of polypropylene.
Titanium can be alloyed with iron, aluminium, vanadium, molybdenum, among other elements, to produce strong lightweight alloys for aerospace (jet engines, missiles, and spacecraft), military, industrial process (chemicals and petro-chemicals, desalination plants, pulp, and paper), automotive, agri-food, medical prostheses, orthopedic implants, dental and endodontic instruments and files, dental implants, sporting goods, jewelry, mobile phones, and other applications.
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