If you have a look at the title of this article you will see that some initial letters are capitalized and some are not. Although the capitalization of words in titles can sometimes depend on the particular style of a writer, institution or publication, there are some general rules to keep in mind.
The rules for capitalization in titles of articles (and also books, papers, speeches, etc) can vary according to a particular style guide, such as The Associated Press Stylebook, The Chicago Manual of Style, and MLA Handbook. Generally, you will use title case, although as you will see below sentence case is an option. While you will find similarities between each guide, it's important to pay attention to their differences.
Style guide similarities:
Style guide differences:
So, which style should you choose? Well, it all depends if a certain style is required by your teacher, course, or subject/field. For example, MLA style is commonly used in the liberal arts or humanities. AP style is popularly used in journalism, Chicago is often used in business. A suggestion is to choose one style, or check which style is required by your teacher or editor, and stick to it.
As we can see, there are some exceptions to the general rules for title case set forth by each style guide, but they mostly follow a similar pattern. We know to capitalize the first, last, and important words in a title. Important words include nouns, pronouns, verbs, adverbs, and more. So, generally, these parts of speech are capitalized in titles:
"Short" words-those with less than five letters-are lowercase in titles unless they are the first or last words. Generally, we do not capitalize:
When in doubt and you do not have a reference guide in front of you, here is one general rule recommended by The U.S. Government Printing Office Style Manual:
"Capitalize all words in titles of publications and documents, except a, an, the, at, by, for, in, of, on, to, up, and, as, but, or, and nor."
Now that we know the ins and outs of title case, let's take a look at sentence case. In sentence case, the title is written as if it is a sentence. This is considered a more casual style and is commonly used in newspapers and on the web.
Only the first word has a capital letter:
However, proper nouns within the title are also capitalized:
You might discover that some publications are moving toward sentence case in titles or articles. There are a couple reasons why writers choose this over title case.
First, one could argue that capitalized words slow down a reader's ability to scan, while a title written in sentence case could be perceived as having an uninterrupted flow. Next, some publications prefer this style simply because it's more likely to preserve consistency. With sentence case, there's no nitpicking over the capitalization of a three-letter preposition.
You might notice an overall trend toward this style. Many heavy hitters in the publishing industry use sentence case, including The Boston Globe, LA Times, and USA Today. However, if you pick up a copy of The New York Times, you'll see they stick with title case.
One of the complexities of the English language is that, for every rule you learn, there's probably an exception. Here are some advanced rules for title capitalization:
Let's take a look at The Chicago Manual of Style's guidelines for hyphenated words in titles:
An open compound comes to life when a modifying adjective is used in conjunction with a noun. This creates a new noun. Hopefully, warning bells will signal in your mind, as nouns are almost always capitalized.
Both Chicago and AP Stylebook guidelines say you should:
Prepositions often find themselves on the 'do not capitalize' list. However, when a preposition becomes an important part of a phrasal verb, it does need to be capitalized.
If you are debating how to capitalize titles in research papers and articles, your professor or editor will most likely delegate a certain style. In that case, make sure you visit the handbook on that style guide's website. There will be ample guidance and examples. Aside from that, there are a wealth of other resources and handy tools out there. As you craft your titles, pay careful attention not only to the type of word, but also the length and placement of each word.
Furthermore, no matter your personal preference, make sure you write the exact titles of books, newspapers, journals, etc. as they are written on the original document (even if they do not follow common capitalization rules).