Welding is the process of securely joining two materials together using the process of coalescence and often also a filler material. Welding releases heat and energy which in turn liquefies the materials at the intended joint. When the materials re-solidify a secure joint is formed. Typically the materials joined consist of metals or thermoplastics.
Welding allows advanced fabrication to be undertaken by securely affixing these materials and thus facilitating the creation of a more developed piece of equipment or structure which can then be used accordingly for its intended purpose. In order to accomplish this important role welding must be versatile enough to work with a wide variety of different metals and thermoplastics in a range of varied, often difficult conditions.