This is just a SWAG on my part, but I'd wager that this special recognition is a combination of minimum MQM - AND - minimum revenue, that makes a magic light go on at DL and *POOF* your a "titanium medallion". And if the average is too low and/or both the mins are not met, you get bupkis...
(beyond the "plain old" - excuse me - "enhanced" PM.)

Great for those that get it. And the rest of us gotta try harder.