Do you capitalize the second part of a hyphenated word in a title?

Not a grammar expert, but I’m going with the former, unless you are talking about something that is trademarked where the second word is capitalized.

It’s a matter of style, which means that it is considered right either way. If you are working with a particular style guide or publisher, you follow its rule. If you are on your own, you choose a practice and stick with it consistently.

When using title and heading styling, I always capitalize the second term in a hyphenated expression unless I am following a house style or a style guide that explicitly calls for lowercase.

I was just on Amazon looking for a specific book with a hypenated title, ‘The Face-Changers.’ So the answer is, Real-Time.

Amazon is not an authority on style. Amazon is following a style.

If you’re capitalising all non-hyphenated words, I would say stick with capitalising both hyphenated ones too. The usual practise is to leave “common” words like and, of, in, etc as lower case, and capitalise the rest. For example “Adventures in Real-Time”.

It’s not lowercase for “common” words. It’s lowercase for prepositions, articles, and conjunctions, unless they come first or last, are part of a phrasal verb, or follow a colon as the beginning of a subtitle. All verbs are capitalized, even “is” and “are,” although they are both short and common.

Most style guides also have a rule about init. capping prepositions of more than four letters or more than five; some house styles would cap “among” and others wouldn’t, depending on which way they go in this rule. They would pretty much all cap “between.”

You should capitalize all words in a title except “a”, “an”, “the”, “of”, “or”, etcetera (all the short little words that connect ideas but do not express the main idea) unless they are the first word in the title such as “The Quick Fox Jumped over the Lazy Dog”.

@tigress3681, whether “over” is capped will depend on the style rule you are following for prepositions.

All verbs, even “short little words,” are always capped.

The rules are customarily expressed in terms of parts of speech and position in the title and not in terms of main ideas.

@Jeruba No kidding.