[Kitanna]

This thread makes me think of little old Bilbo Baggins. He was the only one in the history of the Ring to actually give it up and not have it taken by force or it slipping from his finger and betraying him. And the only reason he gave it up was because of Gandalf.
So would it have been destroyed if Gollum had not fought Frodo for it? I highly doubt it. Sam could never kill Frodo and the Ring had too much of a hold on Frodo for him to even reconsider his choice.
However what if Gandalf had not fallen in Moria and he had gone on with the Fellowship? If he had gone on with Frodo does anyone think Gandalf could have persuaded Frodo like he had Bilbo? Afterall Frodo did not have the Ring as long as Bilbo.
Still nothing short of a sudden character change by Sam would have destroyed that Ring.