Davies defied her 51 years to card a superb seven-under 66, but she was denied the lead by her English compatriot Reid on an entertaining opening day at the??Regnam Carya Course in Belek.
Reid got off to a solid start with four straight pars before picking up shots at three of the next four holes to turn in 33, and she maintained her charge with a run of four birdies in five holes from the 11th.
The 27-year-old rolled in her eighth birdie putt of the day at the long 17th and parred the last to complete a bogey-free opener and edge one clear of Davies.
“I hadn???t seen the course, so perhaps that???s the way forward. I walked about 12 holes yesterday to look at a few tee shots but I played about the last seven holes completely blind,??? said Reid.
“Just before I went out I saw Laura birdie her last hole so I knew that she???d had a good round, which was nice to see. I knew that there was a low score out there so I tried to keep in touch with her, so to shoot eight under was nice.”
Davies started on the 10th and birdied 11, 15, 17 and 18 before making her only mistake of the round at the first, where she called a penalty on herself after her ball moved while she was attempting to remove a loose impediment.
But the veteran hit back with three consecutive birdies from the third, and another at the ninth gave her the early clubhouse lead on seven under par.
The four-time major winner, who is soon to be inducted into the World Golf Hall of Fame, said: “I played well, hit 18 greens. I had a problem down the first when I moved a twig and my ball moved, but I then hit the shot on to the green, so I figured I hit 18 greens today, which is always a good feeling.
“I drove it well, hit two dodgy tee shots and putted nicely. It was the first time in I don???t know how long.???
Current order of merit leader Gwladys Nocera is two shots further adrift after opening with 68 featuring an eagle and four birdies despite not having fully recovered from an ankle injury sustained last month.
She said: “I ripped a tendon four weeks ago falling off a golf cart, so I had a cast and I had crutches. It???s not healed yet but I???m working on it and the physio from the French Federation is here working on it, so that???s why I have a really nice strap that allows me to play. It???s painful and that???s why I didn???t play in China, because I couldn???t walk, so it???s better.
???I???m really pleased with today. I???m not physically 100 per cent so I???m trying to play smart and not to do anything stupid, not to be too greedy.???
Noora Tamminen, Rebecca Artis and Caroline Martens share fourth place on four under, while Scotland’s Carly Booth made four birdies on the inward half to post a 70.
But defending champion Valentine Derrey faces a battle just to make the cut after making three bogeys and a double-bogey seven at the ninth which closed out a disappointing four-over 77.