Answer:

Font Replacement

You must have the desired font activated via Theme Options > Typography, or a font plugin activated and the font selected, such as Typekit or WP Google Fonts.

Replace All Titles With the Same Font

Add the following code to the Custom CSS box under Theme Options on the General tab:

.slider-copy h2{font-family: “Your Font Name“, Helvetica, Arial, sans-serif;}

Replace Your Font Name with your font’s name. Example: “Open Sans”

Recommended Reading

Overview of WP-Google-Fonts for Extended Typography Control