Alloy
The first alloy to be discovered was Bronze. Bronze is made from copper and tin. Bronze was discovered a very long time ago in  the prehistoric period. Then, bronze was being used for making tools and weapons. This period was known as Bronze Age. But, later better alloys were discovered which replaced bronze for making tools and weapons. Now, bronze is used for making ornaments, statues, and bells. Brass is another alloy made from copper and zinc.