Titanium

• Titanium is a fairly new metal in comparison to others (such as steel, copper and aluminium), and it is the fourth most abundant metal, making up about 0.62% of the Earth's crust
• Titanium is particularly useful due to its high corrosion resistance, even to salt water and chlorine
• Titanium has a high strength-to-density ratio, making it suitable for use in applications such as knee replacements
• The supersonic Concorde planes were coated in a heat-proof titanium skin that could stretch as much as 250 millimetres during flight. Its strength and low density made it a good choice of material for aircrafts, and when exposed to the elements it doesn't go rusty

  
• Titanium can resist the effects of the rain and moisture in the air by reacting with oxygen to produce titanium oxide, which keeps out water and air
• Titanium can be alloyed with other metals such as aluminium and vanadium. It's also frequently used as titanium oxide. In this form it can be used as a white pigment in plastic and paint and as a suncream in cosmetic products