Checkbox to designate a text box as the slide title

While I can see some applications for what you are suggesting, I can't picture how a built-in feature would enable this with adequate flexibility. I can however provide you the javascript needed to implement it yourself.

Notice that elements includes both scene titles and slide titles, starting from zero. I have successfully used this in combination with a variable that captures the student's country and updates the slide names to match their local content/spelling. You should be able to do the same using a trigger of your choice. 

let elements = document.getElementsByClassName("linkText");

elements[0].innerHTML = "This is the first scene name";
elements[1].innerHTML = "This is the second slide/scene name";
elements[2].innerHTML = "This is the third slide/scene name";