<p>This study examines the hydrogen embrittlement (HE) behavior of silicon steels with different microstructures and internal strains, processed through various heating treatments. Cold-rolled (CR) and annealed (AN) samples exhibited a ferritic phase, while water-quenched (WQ) and bake-hardened (BH) samples displayed a martensitic structure. CR samples had high strain from plastic deformation, whereas WQ and BH showed moderate strain from martensitic transformation. Hardness and ultimate tensile strength (UTS) increased with silicon content, with WQ and BH exhibiting the highest values and AN showing the lowest UTS but highest ductility. Hydrogen charging reduced UTS and significantly decreased fracture strain in CR, while WQ and BH experienced moderate reductions. AN samples remained unaffected. HE susceptibility correlated with diffusible hydrogen content, which was highest in CR and lowest in AN. After hydrogen charging, CR samples exhibited brittle fracture, WQ and BH showed mixed failure modes, and AN retained ductile failure. High silicon content effectively reduced HE, emphasizing its importance in developing HE-resistant silicon steels.</p>