The study monitors into the effect of electrode tool material on geometrical and surface properties of wire electric discharge machined (Wire EDM/WEDM) Nickel-Titanium (Ni-Ti) alloy. Focusing on a 0.25 mm diffusion annealed A-type wire electrode, the study explores their influence on nickel-titanium alloy properties using WEDM. Input variables include Pulse on (Ton), Pulse off (Toff), and Wire feed (WF), with constant peak current and voltage. Objectives encompass examining geometric effects, understanding combined effects on surface roughness, and optimizing parameters employing Response Surface Methodology (RSM) and taguchi tools. The experiment follows a Full Factorial Design with an L27 orthogonal array, ensuring comprehensive coverage. Findings show an optimal Mean Diameter (Dm) value at lower Ton and moderate Toff durations, while significant Toff and WF values yield optimal Sparking Frequency (SF). Lower SF is noted at higher Ton durations. Additionally, better Surface Roughness (SR) values are seen at lower Ton and moderate Toff durations, while lower Kerf Width (KW) values are achieved with higher Toff and WF. Characterization through confocal microscopy and SEM images enhances surface property insights. The integrated RSM and Taguchi methodology offer a systematic approach to enhance precision and efficiency in WEDM processes while minimizing resource utilization.