Metals can be solid or liquid. Through Melting Phase Transition, the solid metal will change its state from solid to liquid. Through Freezing Phase Transition, the liquid metal will change its state from liquid to solid.
There are five common state changes between the three common states of matter. They are melting (solid to liquid), freezing (liquid to solid), condensation (gas to liquid), evaporation (gas to liquid) and sublimation (solid to gas, gas to solid).