Titan is the only moon in the Solar System with a dense atmosphere and active hydrologic system. It is also an Ocean World, with a deep interior water ocean that may provide a harbor for life. Photochemistry in the stratosphere consumes methane and generates a wealth of complex organic molecules, similar to the atmospheric chemistry of prebiotic Earth. Molecules grow in size through a variety of processes, ultimately forming haze particles that settle on the surface and are reworked into large equatorial dune fields. In the lower atmosphere methane and ethane form lakes, seas, clouds and rain in a weather cycle analogous to the Earth’s water-based meteorology. The surface exhibits infrequent craters, but offers other mysterious landforms interpreted as mountains, putative cryovolcanoes, tectonic features, and fluvial/lacustrine morphologies. In this session we welcome all recent research relevant to Titan, including new observations, spacecraft data analysis, modeling and laboratory experiment work.