V–Ti-Based Solid Solution Alloys for Solid-State Hydrogen Storage

• V–Ti-based solid solution alloys exhibit reversible hydrogen storage capacity exceeding 2 wt% at ambient temperatures, making them promising for solid-state hydrogen storage. • Hydrogen storage performance is critically influenced by elementary composition, phase structure, and homogeneity of the alloy. • Micro-strain accumulation during cycling is identified as a primary cause of capacity degradation in V–Ti-based alloys. • Future development should focus on low-cost, high-performance alloys with enhanced cyclic durability and activation performance for practical MH tank applications.