A welding fixture is a tool that holds and positions workpieces during the welding process. They are used to ensure that the workpieces are held in the correct position and orientation so that the welds are accurate and consistent. There are 4 main types of welding. Each with its own unique properties and applications. The four types of welding are gas metal arc welding (GMAW), flux-cored wire-arc welding (FCAW), shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW).