What's with title letters on this forum?

I mean, they are really something special in smooth way they display.
How can I achieve that effect on my headlines?

Which title letters do you mean? Can you provide a screenshot?

I mean letters that are in title of every thread when you visit this forum.

The GRAV-text-logo?

no. meta

Screenshot please, is more simple to understand ^^

Titles of topics. Sigh.. How much simpler can I put it? lol
here:
http://prntscr.com/8fuwuf

Just inspect it with your browser.

There's nothing fancy going on. It's just a Google font called Muli with some minor adjustment on letter spacing and a slightly transparent black: color: rgba(0,0,0,0.6);