"Superb" was transferred to the Mediterranean Fleet in October 1918 and became its flagship. She supported Allied forces in the Mediterranean and the Black Sea after the war ended in November. The ship was deemed obsolete and was reduced to reserve when she returned home in early 1919 and was then used as a training ship. "Superb" was used for gunnery experiments in 1920 and then became a target ship in 1922. The ship was sold for scrap late that year and broken up in 1923.