In 1952 the term Commonwealth Realm replaced Dominion in Commonwealth parlance.
You're right. In 1953, the term "dominion" was replaced by "her other realms and territories" of the style of the British sovereign:
1952–1953: By the Grace of God, of Great Britain, Ireland and the
British Dominions beyond the Seas Queen, Defender of the Faith.
1953-present: By the Grace of God, of the United Kingdom of Great Britain and Northern Ireland and of
Her other Realms and Territories Queen, Head of the Commonwealth, Defender of the Faith.