"professional title" is correct and usable in written English.
You can use it when referring to a person's job title. For example, "My professional title is Accountant."
Nothing wrong with using a professional title.
Mickelson is coming off his first professional title in Britain, at the Scottish Open.
It was the first professional title for Marbury, 35, who spent 13 seasons in the N.B.A.
The clerks said the professional title was not part of the candidate's name.
But initially he could not beat Sergio Oliva, for the professional title, Mr. Olympia.
Four years later, he was about to answer the bell for his first professional title bout.
The 20-year-old Scott, seeking his first professional title, had an 18-under 198 total.
"I always imagined myself winning a professional title, but I never thought it would be a major.
Only those nurses who fulfilled the qualifications defined by their state's Nurse Practice Act (NPA) could use the professional title.
Holyfield would buckle it around a waist that has barely expanded since he won his first professional title, in 1990.
That was the last major professional title in Philadelphia until Charlie Manuel's Phillies won the 2008 World Series.
