Yes, you can create a measure and point your title field at that. For example, on our HR reports I have 2 graphs, one by department and one by employee. The employee graph only shows data once a department has been selected, as otherwise the employee graph would be very long. The measure looks like this:
Emp Hol Booked Title =
IF( HASONEVALUE( Departments[Description] ),
“Holidays Booked % by Employee”,
“Please select a department from the graph above” )
If you tweak this to your selection field it should work for you. I then select this measure as the title for the graph: