Championship unification

Championship unification is the act of combining two or more separate professional wrestling championships into a single title.

In professional wrestling, championships may be unified to consolidate the number of championships in a given promotion, or to add legitimacy and prestige to a certain title's lineage.

In a title-for-title match, one of three things will happen:

Triple H holding the former WCW Championship (left) and WWF Championship (right) as the Undisputed WWF Champion
Randy Orton unified the World Heavyweight Championship (left) and WWE Championship (right) as the WWE World Heavyweight Championship.