Lots of times as I post to a thread and begin a conversation with other people here, it clarifies my thinking. As I read your posts here, I wonder if the same thing might be occurring. You started off wanting to be beaten more frequently without requiring sexual gratification afterwards, but as you posted more it seemed that what is really bothering you is that your partner becomes cold and withdrawn when he is angry at you, and you would prefer that he express his anger another way - at least some of the time.

If this is true, I would strongly suggest talking with him about THAT - how you feel when he withdraws from you. I would stay away from offering alternatives, first, because that might be a little cheeky, but second, because you might not actually know what would work better. It really depends on why he withdraws affection. You hinted that perhaps he fears that he would injure you with his anger. This is a very different reason than if, for example, he knew exactly how undone you become when he withdraws and he likes that. So talking about how you feel and how he feels is really important. Once everyone has that information, maybe you can experiment with other ways that he can express his anger.

If his withdrawal really makes you panicked, I see no reason that a safeword couldn't be used appropriately to indicate the level of your distress - but I wonder what other people think about that.