The see of titular bishop is only nominal, not pastoral- meaning he does not exercise final authority as the head bishop (the ordinary), or have the right to automatically succeed the aforementioned individual (the coadjutor), over an existing diocese or archdiocese or their Eastern rite equivalents, (arch-)eparchies.
Occasionally, as a priest, they may have been given a titular bishopric or archbishopric as an honor by the Pope, similar to when he names some cardinals.
[3] He is responsible for teaching, governing, and sanctifying the faithful of his diocese, sharing these duties with the priests and deacons who serve under him.
The sees listed in the 2007 Annuario Pontificio as having more than one bishop emeritus included Zárate-Campana, Villavicencio, Versailles, and Uruguaiana.
The term is distinct from protoiereus (archpriest), the highest ecclesiastical rank which a married priest may attain in the Greek Church.