Kylie Jenner Is the One...Here's the Ink to Prove It - Tyga

When it comes to Tyga's women ... there's only one on his arm -- in permanent ink -- and her name is Kylie Jenner ... NOT Blac Chyna. lol

A photo surfaced today of Tyga with a fan, but more importantly ... he's flaunting fresh ink -- his 17-year-old GF's name is now on his inner right elbow. Sources close to the rapper tell TMZ ... he got the tat on Friday to prove to Kylie he is fully committed to her and no one else.