Elastic material properties of metamict titanite (sample E2312) during thermally induced stepwise recrystallization are measured using nanoindentation. Changes of the elastic modulus (E) and the hardness (H) are related to increasing long-range order and vanishing amorphous interface areas. Metamict titanite shows H and E values close to titanite glass. H decreases on annealing until ca. 950?K to 9.08?GPa and increases at higher temperatures, while E increases continuously on annealing up to ca. 168.4?GPa at 1220?K. Crystalline titanite from Rauris shows strong anisotropy and H and E values are clearly larger than those of E2312.