Merging metals is a process of joining two or more pieces of metal together by welding. Welding is a fabrication process that uses heat to melt and fuse materials together. It is commonly used in the construction of buildings, bridges, and other structures, as well as in the manufacturing of machinery and equipment. Welding is also used to repair damaged metal components. The process involves melting the two pieces of metal together and then allowing them to cool and solidify, forming a strong bond between them.