Automotive braking systems are crucial components of cars because they help slow down and stabilize the vehicle when it is stopped. The majority of a vehicle's kinetic energy is transformed into thermal energy during braking because of the effects of dry friction. Managing the thermal energy produced by a braking system's operation is one of its primary issues. In this study to analyze the thermo-mechanical behavior of straight vane, Curved-zigzag and straight - pillar vane ventilated disc brake rotors. The main objective of the study is to analyze the thermo-mechanical behavior of disc brake rotor analytically and numerically. The Coupled Field Transient and Static Structure Analysis Ansys 2022 R1 Workbench served as the foundation for this analysis. The disk brake rotor's deformation, equivalent (Von-Mises) stress, surface temperature, heat flux and fatigue life are displayed numerically in the analysis and simulation results. The results have been used to compare that the rotor having straight vane made gray cast iron on its surface exhibited 148.50C of temperature, 1.39W/mm2 total heat flux, 0.262mm deformation, 105.7Mpa of equivalent (Von Mises) stress. For carbon steel material, whereas the Curve – zigzag vane ventilated disc brake rotor 0.2378mm, 229Pa, 138.7°C, 1.1W/mm², 5*107 respectively, the straight – pillar vane ventilated disc brake rotor 0.235mm, 179.5Pa, 137°C, 1.38W/mm², 5*107 and straight vane 0.27mm, 217Pa, 1410 C, 1.39W/mm², and 5*107 respectively. The straight – pillar and curve – zigzag vane has showed very low thermal and structural behavior than the existing straight profiles, the straight-pillar vane ventilated brake disc model is the one suggest that for a more cost-effective and secure operation. Key words: ANSYS 2022 R1, Thermo-mechanical, fatigue life, Curve – zigzag, Straight, Straight- pillar