If you requested a name change in the petition for divorce, the judge can order the change in the final decree. This will only let you change your name back to one you used before your marriage. You cannot change it to something new as part of the divorce.
If you want a new and different name, you will need to go through a separate name change process. Please see our guide to Name Changes in Texas for information and forms.
Once your name has been changed, you will need to get your official documents changed to your new name. These official documents might include your driver's license, social security card, and passport. For information about how to do that, please see the Name Change page of our guide to marriage.