In other words it is TIG welded. GTAW, or as one tends to see it TIG (GTAW), is one of those acronyms that hasn't caught on among those who want to communicate with others.


Lots of frames are MIG (GMAW) welded, but none that I know of by custom builders. If you look at all those aluminum frames, or steel, that are at places like Walmart, they often have runs of perfect "dimes" very nice looking really, and that is probably MIG machine welding.

Here is the Marchetti machine for MIG welding, though who knows, that may be Italian for TIG.

http://www.marchettispa.it/telai/det...?DocumentID=16