Before revision: Turning titanium ingots into bars and sheets is a challenge due to titanium’s reactivity: it readily absorbs impurities, requiring “frequent surface removal and trimming to eliminate surface defects” which are “costly and involve significant yield loss.”" Sulfur hexafluoride is often used in the appurtenant processes because it is heavier than air, to impair oxidation .
After revision: , much like argon is used to cover the Gas metal arc welding processTurning titanium ingots into bars and sheets is a challenge due to titanium’s reactivity: it readily absorbs impurities, requiring “frequent surface removal and trimming to eliminate surface defects” which are “costly and involve significant yield loss.”" Sulfur hexafluoride is often used in the appurtenant processes because it is heavier than air, to impair oxidation .