Droplet form fine particles and spray arc through space to a state of rapid transition in the form of the bath, called jet transition, the transition can be divided into shoot spray droplet transition and jet transition in two forms. 
Jet transition: Under certain conditions, by the action of the heat of the arc and the arc force, gas molten metal wire ends into the tip of a pencil-like pressure to the small droplet from the liquid column tip enters the high-speed axial transition bath form, called a jet transition. The diameter of the wire is much smaller than the diameter of the droplet transfer, high frequency, it looks like the presence of a metal flow in the flow of the bath wire ends. 
Drop shot transition: Under certain conditions, a transitional form of droplet size and wire diameter similar to gas shielded welding wire metal droplet separation more obvious forms and fired at high speed along the wire axis droplet formation, called to drop shot transition.