Friction welding has emerged as a recent and highly effective method for creating solid-state metal junctions, experiencing a surge in popularity due to its manifold benefits and wide-ranging applications across various sectors. This technique allows for the creation of robust and dependable bonds without the need for melting. In this study, conducted using Simufact Forming Simulation Software, critical outcomes such as maximum temperature and equivalent stress were extracted under diverse friction welding conditions including applied force, hold time, speed, and stroke. Analysis of the data revealed either linear or quadratic relationships between these parameters and the resulting temperature and stress levels. Specifically, for the welding of aluminum and Inconel 718 hollow tubes using rotary friction welding, the best conditions were identified as follows: a rotational speed resulting in a maximum temperature of 492.48 °C and an equivalent stress maximum of 534.47 MPa, applied force parameters yielding a maximum temperature of 363.43 °C and an equivalent stress maximum of 349.41 MPa, and an optimal hold time leading to a maximum temperature of 363.06 °C and an equivalent stress maximum of 391.18 MPa. These findings provide valuable insights for achieving superior welding outcomes with precise control over temperature and stress levels.