No, he cannot Even if he succeeds, it will have no effect on Thanos. What Doctor Strange did to Dormammu is heavily misunderstood. Dr Strange attempted to halt Dormammu's attack by reversing time. However, it was unsuccessful against Dormammu because he was simply out of time. Even reversing all of Earth's time wouldn't be able to save him. As a result, Dr Strange chose this strategy: he locked himself in a time loop, which implies that if he is killed, his time will be reset to the moment before he did it. However, because he couldn't change Dormammu's time, it will appear that the same thing is happening to him over and over again. Dr Strange will experience his “ I’ve come to bargain” death only once in every loop, while for Dormammu, it will become an annoying repeat. Because Thanos is a physical creature who is not beyond time, if Dr Strange tries this on him, he will not have the same experience as Dormammu. He'll have the same experience as Dr. Strange...