An assemblage of Al-low titanite and ilmenite is present in Ti-rich microgranodiorites intruded in the Moldanubian Zone of the Bohemian Massif. Titanite is characterized by coupled substitution (Al, Fe3+) + (F, OH) ⇔ Ti +O, with a slight excess of (Al, Fe3+)-OH component over of (Al, Fe3+)-F component. Ilmenites have FeTiO3 amount between 86 and 95 mol. % and are partly enriched in the MnTiO3 (pyrophanite) component (4-10 mol. %). The relatively low content of MnTiO3 component in ilmenite, together with absence of magnetite suggests that first crystallization phase of microgranodiorites connected with origin of ilmenite started in conditions of low fO2. However, titanite together with ferroactinolite originated in late-magmatic stage most likely due to hydration reaction such as clinopyroxene + ilmenite + quartz + H2O = titanite + amphibole during some increasing of fO2 and fH2O., Miloš René., and Obsahuje bibliografii