What does the term "tailing off" refer to in GTAW?

The term "tailing off" in Gas Tungsten Arc Welding (GTAW) specifically refers to the practice of gradually reducing the heat at the end of the weld. This technique is essential as it helps in minimizing thermal shock and warping of the material being welded. When the heat is decreased slowly, it allows the base metal to cool evenly, which can result in a stronger and more consistent weld. It also reduces the chances of defects that can occur from abrupt cooling. Implementing this technique ensures a smoother transition as the weld pool solidifies and helps maintain the integrity of the welded joint.