Don't over capitalize characters
Only use capitalization for the first charater, that will keep your title looks more friendly, and readers will be able to fastly skim your title with more time to think of your main ideas.
Use normal capitalization, not "newspaper capitalization". "Thread title style guide" instead of "Thread Title Style Guide". Capitalize the first letter of the title unless it a trademark like "eMachines".
Don't over-modify font
The fact is mobile platforms display default font, and over-modification on fonts might makes your text unfriendly. I also believe that most of users prefer default font.
San-Serif or Serif when modifying Font Face for your posts/ threads