<p>Mafic granulites and charnockitic rocks constitute a notable litho-association of the Eastern Ghats Province (EGP), India. The mafic granulites containing abundant hydrous minerals (hornblende and/or biotite), designated as hornblende granulites and hornblende-biotite granulites; whereas, those with dominantly anhydrous assemblages, are the two-pyroxene granulites. Based on the textural and compositional attributes, the hornblende present in such hydrous and anhydrous assemblages are typified as type-I and type-II respectively. Type-I hornblende containing pyroxene and plagioclase at their embayed margins has relatively higher TiO₂ and K₂O contents. Towards their rims, subtle Mg enrichment and Ti depletion (consistent with the formation of opaque oxides along the hornblende margin) are noteworthy. Such signatures show coherence with hornblende dehydration melting thereby indicating prograde hornblende breakdown. The type-II hornblende, forming partial rims on orthopyroxene, has relatively lower TiO₂ and K₂O contents. These are interpreted as hydration products of pyroxenes owing to retrogression. As assessed from pseudosection modelling, the suprasolidus peak assemblage of type-I hornblende-bearing mafic granulite is stable at mid-crustal depths (7.4&#xa0;kbar), between 789℃ and 984℃. The hornblende granulite represents the mafic residue after extraction of melt (probably the enclosing charnockite) during anatexis. Assuming the coexistence of mafic granulite-charnockite, the rare earth element (REE) content of quantitative model 10% equilibrium batch melt on an N-MORB (normal mid-ocean ridge basalts) like source, using the modal composition of the restitic mafic assemblage, is comparable to the enclosing charnockite. These findings contribute to understanding the presence of prograde and retrograde hornblende within the mafic granulites of EGP and also shed light on the granulite-charnockite relation.</p>