I believe you could move 'forward' in time, by bending space/time to such an extent that you slow down your own relative time compared to time in the rest of the universe. This is not really time travel, but from your own point of view, assuming you didn't die in process, time outside would be speeding up giving it a basic illusion of time travel.
But never backwards in time. I think there is a simple concept to describe why. The past no longer exists. Only the consequences of the past exist now.
At best there is the possibility of infinite possible universes that exist along with our own universe. If so, then there must be a universe that is the exact same as our own but at a different time along the shared 'history'. Maybe then you could find the universe the same as ours in the correct time you want and travel to it. Maybe. But probably not.
A warrior keeps death on the mind from the moment of their first breath to the moment of their last.
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