<p>The hot deformation behavior of 00Cr12Ni10MoTi (S-03) maraging stainless steel ingots prepared by vacuum induction melting was systematically investigated using a Gleeble−1500 thermal simulation tester. The experimental parameters included a deformation temperature range of 950-1150&#xa0;°C, strain rates of 0.01-10&#xa0;s⁻¹, and a true strain of 60%. Based on the experimental data, the constitutive equations and hot processing diagrams were established, and the tissue evolution after deformation as well as the recrystallization behavior was analyzed by electron backscattering diffraction (EBSD) technique. The research results demonstrate that during hot deformation, S-03 steel undergoes both dynamic recovery (DRV) and dynamic recrystallization (DRX). Electron backscatter diffraction (EBSD) observations reveal that dynamic recrystallization during high-temperature compression can be significantly enhanced through controlled adjustment of temperature and strain rate, with the DRX volume fraction increasing from a minimum of 10.55% to a maximum of 20.23%. Furthermore, EBSD analysis reveals that the DRX process is driven by a dislocation consumption mechanism, with recrystallized grains expanding along their free growth directions, leading to a reduction in texture intensity. Quantitative statistics demonstrate that both dislocation density and texture strength exhibit a significant negative correlation with the degree of dynamic recrystallization.</p>