Yes — "this" is always capitalized in title case because it is a pronoun or determiner.
"This" is a demonstrative pronoun or determiner and is always capitalized in title case. AP Style, Chicago Style, MLA Style, NYT Style, and AMA Style all treat "this" as a content word requiring capitalization.
The word is four letters long, which occasionally causes writers to wonder whether it falls under the short-word rule. It does not. The short-word lowercase rules apply to articles, conjunctions, and prepositions, not to pronouns or determiners.
APA Style, Wikipedia Style, and Sentence Case lowercase "this" in the middle of a title because those styles use sentence case rather than title case.
"This" is a very common title word, appearing in countless books, articles, songs, and films. Every title case style guide consistently capitalizes it, making it one of the easier words to get right.
"This" functions as a demonstrative pronoun when it stands alone to refer to something — "This Is Important" — and as a demonstrative determiner when it modifies a noun — "This Time Around." In both cases, it is capitalized in title case.