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1. Preparation: Clean the titanium workpieces to be welded. This can be done using a degreasing solvent or by grinding the surface. Also, use a wire brush to clean the surface. Do not use the same brush for other metals, in order to avoid contamination of the titanium.
2. Choose the right welding method: There are several welding methods you can use for titanium Welding. They include the gas tungsten arc welding (GTAW) and the plasma arc welding (PAW). The GTAW or TIG (Tungsten Inert Gas) welding is the most popular due to its high precision and control.
3. Use a shielding gas: Applying shielding gas is crucial when welding titanium. In all welding processes, be sure to consistently use argon or helium shielding gas before, during, and after welding to prevent contamination. The argon shielding gas is more preferred since it’s heavier than air and provides a better gas blanket during and after the welding process.
4. Welding the titanium: Position the parts to be welded in a secure place. Then using your welding torch, melt the edges of the two workpieces plus the filler rod. Be careful to not overheat the titanium and keep a consistent speed to avoid cracking or warping the material.
5. Post-welding cleaning: After welding, it's important to let the titanium cool under the shielding gas before exposing it to the atmosphere. This is to prevent the titanium from reacting with oxygen.
6. Inspection: Inspect the welds to ensure there are no defects and correct as necessary. This may include dye penetration inspection, visual inspection or x-ray methods.
7. Safety: Always remember to wear the appropriate protective gear, including a helmet, gloves, and protective clothing to protect you from sparks and the intense light produced by the welding process.
8. Practice: Welding titanium can be challenging and requires a certain level of skill. Consider practicing on scrap pieces of titanium to perfect your technique before attempting to weld crucial parts.
Note: Unless absolutely necessary, it's often best to avoid welding titanium because it's a complex process that requires a very controlled environment.
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