What significance does the title Disgrace bear in the novel

I can't write your essay for you. The word "disgrace" appears throughout the book and is used in reference to a number of characters. David, for example, experiences disgrace in different ways. He disgraces Melanie by inflicting shame on her. He loses his job and disgraces the University as well. Lucy may not have disgraced herself but she certainly lives in disgrace from the rape inflicted on her.