If there is domestic violence in your relationship, it is unlikely that you will be able to stop it. Usually the only way to stop it is to get out of the relationship. It may seem like you can make your partner better, for the abusive partner may cease to engage in the abuse for several months or even years. But usually, the behavior comes back with a vengeance. For awhile, things may seem like they might be okay, but then it happens again. This is the classic pattern of DV. If you can convince your partner to attend therapy sessions with you, great. If you cannot, you are dealing with an abuser who has no interest in changing.
You can support local nonprofits in your area that serve victims of domestic violence and spread awareness in your local community. You can also help fight against the stigma that women who are abused "deserved it" or are "stupid" for being with a person. A victim of violence is a victim, and they should never be ashamed of the abuse they are enduring. Women should know that they should not be treated in such a way and be empowered to get help for themselves and remove themselves from abusive situations.