I have a 5/4" x 8" x 6' plank of cherry with a twist on one end. The twist is only about 18" long. When you lay it on a flat surface the corner was raised about 1/4". I tried soaking the board in my hot tube for about 3 hours, (about 130F water). Then I wrapped it in an old blanked, laid it on the garage floor, put a piece of plywood on top of it, and drove over it with the car. I left it there overnight (about 10 hours). This morning I removed the car, unwrapped it, and it's still twisted exactly the same! My next thought is I need hotter water, so I have to come up with a container to soak at least 18" of the board in 212F water, and then try the car again. Any thoughts? Do I need to soak it for a longer time? Or let dry with the car on it for longer? It was still slightly wet when I removed the car this morning.
I did a bunch of research but I can't say that you can. Usually with a twisted board you can only joint it flat or cut out what would be useful. I found a question very related to what you asked. The link is below.