Titanium Titanium : symbol Ti, atomic number 22. Titanium has a low density and is a strong, lustrous, corrosion-resistant (including sea water, aqua regia and chlorine) transition metal with a silver color. The two most useful properties of Titanium are corrosion resistance and the highest strength-to-weight ratio of any metal. Titanium and its alloys offer excellent corrosion resistance to acids,
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