Tolkien wasn't too fussed about the title for book 3, he wrote to his publishers: "On reflection I prefer for Vol. III The War of the Ring, since it gets in the Ring again, and also is more non-committal, and gives less hint about the turn of the story... but I am not set in my choice." He probably could have overruled this title if he felt that strongly about it, he had already proposed the two titles as possible options.
Tolkien wasn't too fussed about the title for book 3, he wrote to his publishers: "On reflection I prefer for Vol. III The War of the Ring, since it gets in the Ring again, and also is more non-committal, and gives less hint about the turn of the story... but I am not set in my choice." He probably could have overruled this title if he felt that strongly about it, he had already proposed the two titles as possible options.