If Sora were to say, reject the title even when it's given to him, that'd be cool too. It'd show he's different from Terra, doing almost anything just so that he could get a title even though he clearly already has the power/strength regardless of an official title.
If Sora explained such reasons to Aqua, that'd be awesome too. She said it was the keyblade that tore the three of them apart, but it was actually a title. Sora has shown he doesn't care about the title, nor does he care that Riku is one when he is not. If Aqua wishes to grant it to him, but he says no cause it doesn't matter and he doesn't need it, it'd be even better.
If Sora explained such reasons to Aqua, that'd be awesome too. She said it was the keyblade that tore the three of them apart, but it was actually a title. Sora has shown he doesn't care about the title, nor does he care that Riku is one when he is not. If Aqua wishes to grant it to him, but he says no cause it doesn't matter and he doesn't need it, it'd be even better.