Should The Word Within Be Capitalized In A Title?

If in fact you are paraphrasing a title or subject matter Yes; but otherwise No. For example, you have a movie entitled, "Gone With The Wind"; then of course the word With would be capitalized; however using the word Within for example for a Movie called, "The Stranger Within"; Yes of course in a title format, paraphrase or in a descriptive manner Yes you would capitalize it. But in most all other cases No but most certainly in a Title, as well as using the quotation marks as noted here in this Answer.