No — "nor" is lowercase in the middle of a title in most style guides.
"Nor" is a coordinating conjunction and follows the same capitalization rules as "and," "or," and "but." It is lowercase in the middle of a title in every major style guide except Billboard Style.
"Nor" appears less frequently in titles than "and," "or," and "but," but the same rules apply. AP Style, Chicago Style, MLA Style, NYT Style, and AMA Style all keep it lowercase in the middle of a title.
When "nor" begins a title — less common but used for literary or rhetorical effect — it is always capitalized as the first word. The same applies if it ever appears as the last word of a title.
Billboard Style capitalizes every word without exception, so "Nor" would appear in uppercase in entertainment titles and advertising copy.
"Nor" is the negative counterpart to "or" and is used to continue a negative statement introduced by "neither." As a coordinating conjunction, it is consistently lowercased in the middle of a title by all major style guides.