Is it true that displacement reactions are also used to derive metals from their ores?

The metals are found in the earth’s crust mainly as oxides, sulphides or carbonates. The metals are extracted from their ores. A low reactive metal is displaced by a highly reactive metal from their compounds. For example, manganese dioxide is heated with aluminium powder.

$3{\mathrm{MnO}}_{2 }+ 4\mathrm{Al} \stackrel{ }{\to } 3\mathrm{Mn} + 2{\mathrm{Al}}_2{\mathrm{O}}_3+\mathrm{Heat}$

These displacement reactions are highly exothermic so, the metals are produced in the metal state.