Can I force A to sign over the title of our jointly-owned car to me?
Generally, when two people are legal owners of a car, one cannot force the other one to give up their ownership. One person can make an offer to “buy out” the other person and negotiate an amount that would be handed over once the title is signed over. Or perhaps one person can threaten to sue the other person for reimbursement for payments if that person has failed to make any payments on the car (if there is a car loan) and that may motivate them to give up title to the car. If there is a lawsuit filed for reimbursement of payments, it’s possible that as part of a settlement of the case, the plaintiff may drop their claim for repayments if the defendant signs over the title.
However, I can only speak generally about the laws. I cannot comment on your state’s specific laws or on your specific situation. For specific advice on your situation, and to confirm if you have any legal options to force him to sign over the title or not, you’d need to consult with a lawyer. We have referrals on our Finding a Lawyer page. {HYPERLINK}