Titleist DT SoLo Golf Balls. Introducing the Softest DT Yet. Titleist developed the new DT SoLo with one objective in mind: design the softest compression feel possible and deliver the long distance and control that are the DT standard. Golfers trust that every DT SoLo golf ball offers consistent quality and performance that is the result of Titleists precision world-class manufacturing process. Titleist now delivers the Softest DT Yet.