Welding is the process of joining together two or more pieces of material. Usually, metal or thermoplastic uses high heat on the joining pieces and allows them to cool down, causing fusion. Fabrication is a process where structures of metal are made by cutting, bending, and assembling processes.

This process is commonly used in the manufacturing of metal products such as car parts, machinery, and construction materials. Fabrication techniques can also be applied to other materials such as plastics, composites, and ceramics.