Metallurgy

is the Crafting specialty that deals with metals.

Smelting Ore
The smelting process requires a Stone Furnace as a Crafting Workspace, which must be lit. The small flame particle effect doesn't mean it's lit; Coal must be placed into the furnace by right-clicking. Then place the ore(s) on the furnace and press G to craft.

Metals

 * Bronze

Alloys

 * Latten