As Rafe pointed at, title.cgi uses the title_id as its argument, as that is 1} unique, and 2] immutable (title names *do* change over time as they are edited). If you want to obtain a list of records by title name, it would roughly be:

def SQLloadTitle(titlename):
        query = "select * from titles where title_title='%s';" % db.escape(titlename)
        db.query(query)
        result = db.store_result()
        title = result.fetch_row()
        results = []
        while title:
                results.append(title[0][0])
                title = result.fetch_row()
        return results

Which would return a list of all title_id's by that name. This would not be adequate, as authors sometimes name their collections after a particular short story (for example "Bears Discover Fire), it would also include reviews of the title in question (for example Greg Egan's "Distress").