Top panel: dust-to-metal ratio (solid lines, left axis) and gas metallicity (dashed lines, right axis) as a function of time for the 4 different initial metallicities of the G10LG galaxy: 0.1, 0.3, 1, and 2 Z_⊙ (from bottom to top). Bottom panel: fraction of carbonaceous grains (solid lines) and of small grains (dot-dashed lines). The DTM increases with metallicity, the fraction of carbonaceous grains increases with metallicity and the fraction of small grains decreases with metallicity.