TIG stands for Tungsten Inert Gas. Tungsten inert gas is an arc welding method involving electric arc heat being maintained in between a fixed non-consumable tungsten electrode and the specific component being welded.

1. Advantages of TIG welding?
TIG stands for Tungsten Inert Gas. Tungsten inert gas is an arc welding method
involving electric arc heat being maintained in between a fixed non-consumable tungsten
electrode and the specific component being welded. The area that is being welded is
sheltered from contamination by a shielding gas; in most cases, a filler material is also
used. The power supply used for TIG welding is a constant current type, which is
conducted across the arc via a column of metal vapors and highly ionized gas, commonly
referred to as plasma.
Applications for TIG welding include vessels and pipe work and vessels for offshore,
petrochemical and nuclear industries. It is used in aluminum alloy, magnesium and
titanium fabrications for the aerospace industry. It is also used in motorcycle and bicycle
frames and food, beverage and dairy industries.
Most unusual applications include jewelry, dentistry (for chrome cobalt frameworks) and
titanium (for specialist high-strength, low-weight applications). For fine work and low-
current applications, TIG is increasingly being used as a more versatile alternative to
micro-plasma welding.
Source: http://everlastgenerators.com/wordpress/welders/advantages-of-tig-welding/