Result
It depends on the guide and on how "yet" is used. As a conjunction meaning "but" ("Small yet Mighty"), AP, APA, MLA, AMA, and Bluebook keep it lowercase, while Chicago capitalizes it. As an adverb meaning "so far" or "still" ("Not Yet," "Are We There Yet?"), it is capitalized in every guide.
"Yet" (as a Conjunction) by Style Guide
| Style guide | "Yet" mid-title | Why |
|---|---|---|
| AP | Lowercase | Conjunctions of three or fewer letters stay lowercase |
| APA | Lowercase | APA lists "yet" among the short conjunctions it lowercases |
| Chicago | Capitalize | Chicago lowercases only and, but, for, or, and nor, so "yet" is capitalized |
| MLA | Lowercase | Coordinating conjunctions stay lowercase |
| AMA | Lowercase | Coordinating conjunctions stay lowercase |
| Bluebook | Lowercase | Conjunctions of four or fewer letters stay lowercase |
The Same Headline in Four Styles
| Style | "small yet mighty" |
|---|---|
| AP | Small yet Mighty |
| APA | Small yet Mighty |
| Chicago | Small Yet Mighty |
| MLA | Small yet Mighty |
| Style | "simple yet effective headlines" |
|---|---|
| AP | Simple yet Effective Headlines |
| APA | Simple yet Effective Headlines |
| Chicago | Simple Yet Effective Headlines |
| MLA | Simple yet Effective Headlines |
"Yet" as an Adverb
At the end of a title or after a negative, "yet" is almost always an adverb: "Are We There Yet?", "Not Yet Published," "The Best Is Yet to Come." Adverbs are major words, so all six guides capitalize it there.
Related Words
"So" follows the same pattern, and "but", which means much the same as conjunction "yet," is lowercase in every guide, Chicago included.
Real Titles With "Yet"
- Are We There Yet? (2005 film): adverb and last word, capitalized
"Yet" in Sentence Case
APA reference lists, many news sites, and most UI text use sentence case instead of title case. There, only the first word and proper nouns get capitals, so "yet" is lowercase unless it starts the title: "Small yet mighty." Pick one of the two styles for a whole set of headings rather than mixing them.
Quick Answers
Should "yet" be capitalized in a title?
As an adverb ("Not Yet"), yes. As a conjunction, only in Chicago style.
Is "yet" capitalized in Chicago style?
Yes. Chicago's lowercase conjunction list does not include "yet."
Is "yet" capitalized in APA?
Not as a conjunction. APA lowercases short conjunctions, including "yet."