Final answer:
The pulsed transfer in GMAW produces little to no spatter as it involves a controlled transfer of metal via pulsing between high and low currents, minimizing spatter.
Step-by-step explanation:
There are 3 types of metal transfer possible with the Gas Metal Arc Welding (GMAW) process, and out of these, the pulsed transfer produces little to no spatter. In pulsed GMAW, the welding current is switched between a high peak current and a low background current. This pulsing action allows the molten metal to detach and transfer across the arc in a controlled manner which minimizes spatter.
On the other hand spray transfer involves a steady stream of tiny molten droplets across the arc and while it may be relatively clean compared to other methods it can occasionally produce spatter. Short circuit transfer and globular transfer typically result in more spatter due to the nature of their metal transfer mechanisms.