Volume 5 of Atomic and Plasma–Material Interaction Data for Fusion is devoted to a critical review of the physical and thermo- mechanical properties of presently considered candidate plasma-facing and structural materials for next-generation thermonuclear fusion reactors. This volume should provide fusion reactor designers with a source of critically assessed material properties data, including information on the material response to high heat and particle fluxes and on the thermohydrodynamic coupling with coolants. Emphasis is given to the presentation of the most recent results for plasma-facing reactor materials.