Would India become a Dominion in this timeline?

Would India become a Dominion within this no-World-War-II timeframe?

Probably; Dominion status was already part of a long-running Commonwealth transition that could continue on its earlier timetable.

India was already on a path toward Dominion status rather than being an afterthought created by World War II. Britain had spent decades developing ways to transform the Empire into a Commonwealth of more autonomous members. Rearmament and greater confidence in collective defense could keep that gradual transition moving through 1950. The political change matters to the fleet because Dominion industrial capacity, escorts, bases, and regional forces form part of the wider British maritime system.