Abstract
Titanium alloys are widely used in many fields such as the automotive, aerospace and chemical industries. In some applications, titanium alloys are needed for use with particular welding methods. These are GTAW, GMAW and laser welding. In this study, Titanium Grade-2 (Cp-Ti) plates were welded using laser welding and GTAW. Tensile and flexural tests were applied to the welded samples. The microstructure and SEM images of main material and welded regions were studied and microhardness measurements were performed. Tensile and flexural strengths of laser welded samples were higher than those of GTA welded samples. The microhardness values of the weld-zone of laser welded samples were lower than those of the GTA welded samples welding zone. In microstructure and SEM investigations, the oxide structures and splashes of molten metal appearing like drops were identified. The width of the weld-zone in laser welding was in a narrow range.

Key words
Ti alloys, laser welding, mechanical properties, GTA welding.

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