The objective of this study is to analyze the changes in breaking strength and tensile strength in Titanium 6Al-4V following TIG welding using various parameters. Nine pairs of Titanium (6Al-4V) material with Titanium filler material are welded together using gas tungsten arc welding (GTAW) to produce butt joints. Welding is done to improve and validate the mechanical properties. Welding is done using three different sets of process parameters with three different degrees of values. Mechanical parameters of specimens, such as breaking strength and tensile strength, were measured. Welding current (30–80 A), welding voltage or arc voltage (14–20 V), and inert gas flow rate (1–5 l/min) are the three process parameters with three sets of values. The assessment of the tensile and breaking strengths of welded joints involved utilizing a universal testing machine. Subsequently, optimization of welding parameters, including welding speed, welding current, and gas flow, was conducted using the Taguchi method. The mechanical properties assessed encompassed tensile strength, breaking strength, and peak load. These results contribute to the progress of TIG welding technology for (Ti-6Al-4V) alloys by enhancing comprehension of the interplay between weld material and mechanical properties.