Materials used in the energy sector, notably in fusion energy, require capabilities to withstand high temperatures, pressures, and corrosive environments. The need to prevent hydrogen (tritium) permeation in fusion reactor walls while maintaining fuel integrity is crucial. Hydrogen permeation barriers such as coatings are employed with materials like EUROFER; high-Cr steel as the structural material. The challenge lies not only in the barrier but also in enhancing the substrate material like EUROFER97 to resist hydrogen permeation while retaining superior properties. Understanding hydrogen diffusion in ferrous alloys involves a comprehensive process influenced by factors like dislocations, grain boundaries, traps, and impurities. Cryogenic processing (CP), a novel technique, is explored to tailor microstructure and properties, showing promise in improving hydrogen permeation barriers in high-Cr ferrous alloys. Research combining hydrogen permeation studies, microstructure analysis, and residual stress measurements aims to comprehend hydrogen trapping behavior in EUROFER97 alloy. The comparison between conventional processing and CP provides insights into a potential new technique for effective hydrogen permeation barriers in fusion and hydrogen sectors.