What precaution must be taken when welding titanium?

When welding titanium, it is critical to prevent the introduction of oxygen and nitrogen to the welded area. Titanium has a strong affinity for these elements, which can lead to the formation of brittle compounds, significantly degrading the mechanical properties of the weld. Controlling the atmosphere around the weld area is essential; any contamination can result in weaknesses that may compromise the integrity of the weld and the overall structure.

Techniques such as using an inert gas shield, like argon, are commonly employed during titanium welding to ensure a protective environment at the weld site. This is why the requirement to keep all traces of oxygen and nitrogen away from the welded area is vital for achieving a high-quality weld. Such precautions are crucial for maintaining the performance and reliability of titanium components in various applications, especially in aerospace and high-performance engineering contexts.