Laser bending forming often requires multiple scans to achieve the desired angle, which can alter the sheet material′s structure and impact its mechanical properties. This study focuses on TA15 titanium alloy sheets and employs numerical simulation based on a phase transition dynamics model for dual heating and cooling processes. The simulation models the phase transition during laser dual scanning, revealing the distribution of phase volume fractions across the sheet section under varying laser energy densities and comparing these findings with experimental data. The simulation results indicate that dual scanning increases the phase transition zone size and the total martensitic phase amount. As laser energy density increases, the phase transition zone enlarges, but the martensitic phase volume fraction decreases. This study provides insights into the material structure changes and phase distribution during laser bending of titanium alloy sheets, which is crucial for optimizing the bending process and ensuring material integrity.