The code examples in this tutorial apply to the Genesis entry title however you can use your own theme specific hook or the WordPress filter, the_title to modify the entry title in any theme.
The above code will work with any theme.
This code changes all characters to lowercase.
This code changes all characters to uppercase.
First Character Each Word Uppercase
This code changes the first character in each word to uppercase.
First Character First Word Uppercase
This code changes the first character of the first word to uppercase.