(chemistry) a brilliant white powder, TiO₂, used as a pigment, and in sunblock, toothpaste and cosmetics

The pigment titanium dioxide.

(physics) A minor stable isotope of titanium, ⁴⁷₂₂Ti, having twenty-two protons and twenty-five neutrons; it amounts to about 7% of the element in nature.

(physics) A minor stable isotope of titanium, ⁴⁶₂₂Ti, having twenty-two protons and twenty-four neutrons; it amounts to about 8% of the element in nature

(chemistry) An intermetallic compound of titanium and aluminium, TiAl, used as a heat-resistant material in high-speed aircraft

Any alloy of titanium and a metal or nonmetal

(chemistry) A very hard ceramic material with chemical formula TiC, used in tool bits and in the preparation of cermets

(chemistry) A very hard ceramic material, TiB₂, used as a refractory and in high-temperature electrical applications

Crude titanium metal that has not yet been refined or forged

(physics) A minor stable isotope of titanium, ⁴⁹₂₂Ti, having twenty-two protons and twenty-seven neutrons; it amounts to about 5% of the element in nature