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This paper investigates the effects of voltage, pulse frequency, duty cycle and processing time on the corrosion resistance of micro-arc oxidised TC4 titanium alloy coatings using polar analysis of variance (ANOVA), with a subsequent objective of exploring the significance relationship and the optimum combination of the factor levels of the electrical parameters. Concurrently, an investigation was conducted into the mechanisms through which electrical parameters influence the corrosion resistance of the film layer, with a particular focus on its morphology and physical composition. A regression equation is established to facilitate regulation of the corrosion resistance properties of micro-arc oxidized films through manipulation of electrical parameters. The findings indicate that the duty cycle exerts the most significant influence on the electrochemical corrosion resistance of the membrane layer, the next most influential factors are pulse frequency and voltage, processing time was observed to have a comparatively lesser effect. The duty cycle and pulse frequency influence both structure and performance characteristics of the film layer by altering arc ignition discharge duration as well as arc quenching cooling times. An increase in voltage, duty cycle, processing time, or a decrease in pulse frequency can result in an enhanced power output from the power supply, this leads to an increase in film thickness along with larger pore sizes within microporous structures while reducing densification. Additionally, it promotes more efficient generation of Al2TiO5 within the film layer, however, this ultimately results in diminished electrochemical corrosion resistance. The results of the correlation coefficient testing demonstrate a strong relationship between the dependent and independent variables within the established regression equation. This finding provides theoretical support for predicting methods aimed at regulating performance characteristics in titanium alloy micro-arc oxidation films.