Fusion welding

Fusion welding is a generic term for welding processes that rely on melting to join materials of similar compositions and melting points. Due to the high-temperature phase transitions inherent to these processes, a heat-affected zone is created in the material^: 755 (although some techniques, like beam welding, often minimize this effect by introducing comparatively little heat into the workpiece).

In contrast to fusion welding, solid-state welding does not involve the melting of materials.