A cured or uncured tyre, reinforced by at least one metallic or metallised reinforcement, for example, a carbon steel wire, film, ribbon or cable, on the outside of which is deposited a layer of metal referred to as "surface metal" selected from copper, nickel and copper-nickel alloys, characterised in that this surface metal layer is itself coated, at least partially, by at least one functionalised graphene layer comprising at least one functional group able to be cross-linked in the cured tyre with a polymer matrix such as a diene elastomer.