- Hydrothermal: alpine type veins
- Anglesey: titanite also occurs as a secondary phase within basic gneisses (amphibolites), in central Anglesey, forming large rhombic crystals and less distinct crystal aggregates after ilmenite (Horák, 1993).
- Prenteg, Tremadog, Gwynedd: at Fron Oleu Starkey & Robinson (1992) recorded titanite in alpine-type veins generated by hydrothermal activity.
- Snowdonia, Gwynedd: titanite is present as an accessory phase in various rhyolitic rocks in Snowdonia, Gwynedd (Campbell et al., 1987; Howells et al., 1991) where it forms euhedral crystals up to 200 μm across, with some crystals showing well-developed sector zoining, with tin-rich cores with up to 3.5 wt% SnO2 (A.T. Kearsley, unpublished data, quoted in Bevins, 1994).
- Bevins, R.E. & Rowbotham, G., 1983. Low-grade metamorphism within the Welsh sector of the paratectonic Caledonides. Geological Journal, 18, 141-167
- Bevins,R.E. & Merriman, R. J., 1988. Compositional controls on co-existing prehnite-actinolite and prehnite-pumpellyite assemblages in the Tal y Fan metabasite intrusion, North Wales: implications for Caledonian metamorphism field gradients. Journal of Metamorphic Geology, 6, 17-39.
- Campbell, S.D.G., Reedman, A.J., Howells, M.F. & Mann, A.C., 1987. The emplacement of geochemically distinct groups of rhyolities during the evolution of the Lower Rhyolitic Tuff Formation caldera (Ordovician), North Wales, U.K. Geological Magazine, 124, 501-511.
- Horák, J.M., 1993. The Late Precambrian Coedana and Sarn Complexes, Northwest Wales - a Geochemical and Petrological study. Unpublished Ph.D. thesis, University of Wales, 415pp.
- Howells, M.F., Reedman, A.J. & Campbell, S.D.G., 1991. Ordovician (Caradoc) marginal basin volcanism in Snowdonia (north-west Wales). HMSO for the British Geological Survey, 191pp.
- Starkey, R.E. & Robinson, G.W., 1992. Famous mineral localities, Prenteg, Tremadog, Gwynedd, Wales. Mineralogical Record, 23, 391-399.