Metal hydrides are considered to be an excellent way to store hydrogen in a safe and efficient way for a large range of applications. However, some features such as first hydrogenation kinetics and resistance to air exposure should be improved. In this talk we will review the use of Cold rolling (CR), High Pressure torsion (HPT) and High Pressure Torsion Extrusion (HPTE) on the hydrogen storage characteristics of metal hydrides. Various metal hydride systems will be reviewed: magnesium and magnesium-based alloys that have high capacity but high temperature of operation; TiFe alloy which has a relatively low capacity but has a temperature of operation near room temperature and is low cost; LaNi5 which is another metal hydride that could absorb hydrogen at room temperature; titanium-based BCC (body cubic-centred) alloys which have good hydrogen capacity but are usually too stable; high entropy alloys which is a new class of metal hydride. For each of these systems, we will show the impact of mechanical deformation on the hydrogen absorption properties, crystal structure and morphology. For HPTE the effect on hydrogen storage properties of pure niobium will be presented.]