Merriam-Webster and many other dictionaries defines Title as something that can be used instead of the Name of that thing. For example, based on what I understood, it seems logical to use these sentences interchangeably:
- What is the name of the book you're reading?
- What is the title of the book you're reading?
My question is, how can we understand the scope of things which are included in this rule? For example, can we use title instead of the name of a person, like his title is Jack instead of his name is Jack? Is there any general rule for this?