Deed vs mortgage

[Shannon L Fogarty]

Have a scenario that we are curious about what the answer is. 

Husband and wife purchase a home. Mortgage is in wife's name only. Deed is in both names. A few years later, husband and wife get a divorce. Wife is removed from the deed and still has the mortgage. Wife lived in the house for awhile with kids and then moved out. Husband now lives in the house. Wife wants to sell the house, but husband is on the deed. 

Considering that she is not on the deed, could he sign the deed to someone else without her permission?