Titan Airways has never operated on the Boeing 737 600 but on the 300.
It's my very first livery ever, there are probably many things that could be improved. I hope you'll enjoy flying it though!
Copy and paste the content in the zip file into Xplane 11 > Aircraft > 737NG Series
If you already have the livery folder created, simply drag and drop the folder "Titan Airways (B736)" into it)