Titanium is a metallic element that belongs to the group of transition metals. It has a low density and is highly resistant to corrosion, making it ideal for use in various applications where strength, durability, and lightness are important. It is commonly used in the aerospace industry, medicine, sports equipment, and jewelry.

One of the reasons that titanium is so useful is that it forms a thin layer of oxide on its surface, which prevents further oxidation and protects it from corrosion.