To treat metal by heating, hammering, and forging it.

Subsets
Smithing (Metallurgy) – The practice of mixing metals to make alloys, often focuses more on making the material, rather than shaping it.
Smithing (Copper)
Smithing (Bronze)
Smithing (Brass)
Smithing (Iron)
Smithing (Steel)
Smithing (Gold)
Smithing (Steel)
Smithing (Glassworking)

More will be added as metals are discovered or introduced into lore.