Yes — "was" is always capitalized in title case because it is a verb.
"Was" is the past tense singular form of "to be" and is always capitalized in title case. Every style guide that uses title case — AP Style, Chicago Style, MLA Style, NYT Style, and AMA Style — capitalizes verbs as principal words.
AP Style, Chicago Style, MLA Style, NYT Style, and AMA Style all capitalize verbs as principal words. "Was," "is," "are," "be," and "were" are all verbs and all capitalized.
APA Style, Wikipedia Style, and Sentence Case use sentence case and would lowercase "was" in the middle of a title. These styles do not differentiate between word types — only position matters.
"Was" as a title-opener is always capitalized in every style guide. Titles like "Was It Love?" or "Was She Right?" capitalize "Was" because it is both the first word and a verb.
"Was" is a three-letter verb and is capitalized in all title case styles. The word is short enough that writers sometimes confuse it with lowercase function words like "the" or "and," but the rule is grammatical category, not length.