There are a few differences when it comes down to MIG (metal inert gas) welding and TIG (tungsten inert gas) welding.
While both MIG and TIG welders use rods for heating, the main difference between the two types is that with MIG (metal inert gas) welding, a wire feeds through the welding head in order to create the arc, then melts into a molten pool that acts as filler metal.
On the other hand, with TIG (tungsten inert gas) welding long pieces of electrode become hot enough to melt the metal being welded without passing an electrical current through them.
