titanium

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titanium (symbol Ti) Lustrous, silver-grey, metallic element, one of the transition elements. A common element, it is found in many minerals, chief sources being ilmenite and rutile. Resistant to corrosion and heat, it is used in steels and other alloys, especially in aircraft, spacecraft and guided missiles where strength must be combined with lightness. It was discovered in 1791 by the English mineralogist William Gregor (1761–1817). Properties: at.no. 22; r.a.m. 47.90; r.d. 4.54; m.p. 1660°C (3020°F); b.p. 3287°C (5949°F); most common isotope Ti48 (73.94%).

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