Tungsten Inert Gas (TIG) welding is also known as Gas Tungsten Arc Welding (GTAW) process which is an arc based welding process that uses the arc between a non-consumable tungsten electrode and a work piece with the help of a shielding gas. The TIG welding is used to produce high quality welds and is one of the most popular technologies for welding in manufacturing industries Such as the offshore industry. The main disadvantage of TIG welding process is low weld penetration. The purpose of this review was to look into various techniques that may improve the weld penetration and weld quality in a TIG welding. In this review we discuss the influence of various types methods such as Activated Flux TIG, Flux Bounded TIG, Pulsed Current Tungsten Inert Gas Welding, Laser-TIG hybrid welding, Double shielded TIG process. It has been observed that these methods improve the quality and penetration of the welds than the conventional tig method.