The application of Mico-EDM is very popular for shaping products in the fields of molds, electronics and biomedical, etc. Therefore, improving the machining efficiency of this technology is essential, and the use of coated electrodes in micro-EDM holds great promise for quality improvement in this area. In this study, the influence of technological parameters on the quality parameters in micro-EDM with TiNcoated electrode was investigated. The Taguchi method was used to design the experiment and analyze the results. Process parameters (Voltage (U), Capacitance (C) and Spindle Rotations (SPR)) and quality indicators (tool wear rate (TWR) and overcut (OC)) were selected for evaluation in the study. Titanium alloy billet (Ti-6Al-4V) and Tungsten Carbide electrode (WC) were used for the study. The results show that, U, C and SPR all have a significant effect on TWR and C, and C is the strongest influence on TWR and U is the strongest influence on OC.