Rules of capitalizing a word when using title case depend on various factors. The most important factor is the word class of that word; is it a noun, preposition, verb, etc.? Most dictionaries like Collins classify your as a possessive determiner, while Merriam-Webster categorizes it as an adjective. However, in title case, the only words that you should not capitalize are:

• Articles
• Conjunctions
• Short prepositions

Your is none of these and must be capitalized. This is also the case for all title case styles.

• Check out these examples:
• Can I Be Your Man?
• I Drove Your Car
• Check Your Pocket

If you are not sure which words you should capitalize in a title, try this title capitalizer which will automatically capitalize titles correctly in your preferred style.