Changing title requires a court proceeding and a Judgment Declaring Heirship. Because an estate is involved you must hire an attorney, and hiring an attorney skilled in the area of heirship law can the burden of the loss. In addition, heirship law can be very complicated, so it is wise to hire an attorney with the knowledge to guide you through the probate process.
You will want to hire an attorney, if your interest is not being recognized by the family and it is always advisable to hire an attorney to represent you if there is an heirship dispute of any kind. This area of the law is way too treacherous to attempt to wade through it yourself and valuable property can be affected or lost, if you do not protect them.