Iron is the only metal that can rust.
The usual term for the destruction of a metal by oxidation is corrosion, and 'rust' or 'rusting' is the term for corrosion specific to iron and its compounds.
Why do some metals not rust?
Why some metals do not rust is because they are less active. Look on the Periodic table. The further a element is to the right of the table, the more reactive. That is why metals like gold will rust whereas some metal further to the right like Tin will not. It is also why we made alloys, a mixture of metals, where precious metals are mixed with nonreactive metals so to make an alloy which will not rust. ...