No, anyone in our local area playing the Axis would have conceded long before that happened.
Marsh
Or do you have to own Turkey?
The Allies have to control Turkey at the beginning of the Russian turn for Russia to move ships through the Straits.
Also, according to the rule book: “If a canal or narrow strait is controlled by a power not on your side, but with which you are not yet at war, you must ask permission to use it, which may be denied.”
So in a very theoretical situation, Germany could capture Turkey before being at war with Russia, and allow Russian ships to pass through the Straights. But I don’t think that ever happens.