A comprehensive analysis of the conventional Constrained Groove Pressing (CGP) process reveals that this method consists of three distinct phases: bending, severe stretching and forging. The forging phase often induces microstructural defects, compromising material performance. This study introduces an improved-CGP technique designed to eliminate the forging phase, thereby enhancing structural uniformity and mechanical properties. The transition from severe stretching to forging was precisely identified through analytical modeling and finite element method (FEM) simulations, allowing the process to be experimentally halted at the stretching phase to prevent forging-induced defects. Additionally, the influence of elevated temperature on the improved-CGP process was examined. AISI 1005 low-carbon steel specimens underwent multiple deformation cycles at room temperature (293 K, improved-CGP-RT) and elevated temperature (543 K, improved-CGP-ET). The modified process was evaluated through stress-strain analysis, Vickers microhardness (HV) measurements and grain size characterization, along with detailed macro-fracture analysis. The results demonstrated significant mechanical enhancements. After four cycles, yield strength increased by 308 % (from 154 MPa to 629 MPa) and by 263 % (from 154 MPa to 559 MPa), while ultimate tensile strength rose by 125 % (from 309 MPa to 695 MPa) and by 93 % (from 309 MPa to 595 MPa) for improved-CGP-RTed and improved-CGP-ETed specimens, respectively. Microhardness increased by 123 %, from 82.5 HV to 184 HV. Notably, improved-CGP-ETed specimens achieved an optimal strength–ductility balance after the second cycle. Compared to the conventional-CGPed specimen, the improved-CGPed specimen lowered peak forming force, increased strain inhomogeneity and produced a nar rower grain size distribution. It also improved plastic strain uniformity and reduced crack-prone regions,

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