How do you appreciate the process of alloying?

Explanation

1) Alloying is a very good method of improving properties of metal.
2) Generally pure from of iron is very soft and stretches easily when hot.
3) Iron is mixed with carbon, nickel and chromium to get an alloy stainless steel.
4) The stailess steel is hard and does not rust.
5) Metals get desirable qualities such as hardness, lightness and strength by alloying.
6) Alloys does not oxidised. (eg : Brass, bronze, steel, etc.) So, I appreciate the process of alloying.