Hydriding of titanium: Recent trends and perspectives in advanced characterization and multiscale modeling

[Display omitted] •This perspective article introduces the key unanswered questions and challenges in understanding hydride formation in Ti alloys.•We propose new perspectives on how to solve these remaining issues by integrating advanced characterization and multiscale modeling.•The paper draws upon our own work, as well as provide a contextual review of existing literature studies focused on the integration of novel experimental and computational tools for detailed mechanistic understanding.•The field of degradation science is changing rapidly, and this paper will provide specific examples of how new tools can be applied to an old problem. Titanium (Ti) and its alloys are attractive for a wide variety of structural and functional applications owing to excellent specific strength, toughness and stiffness, and corrosion resistance. However, if exposed to hydrogen sources, these alloys are susceptible to hydride formation in the form of TiHx (0