The International Workshop on Low Temperature Detectors (LTD) is the biennial meeting where experts from all over the world meet to share and discuss latest results and new ideas in the field of cryogenic detectors and their applications. Low temperature detectors with their outstanding characteristics enable unconventional methods for high precision measurements. Their unique and promising features led to rapid technical developments in the last years, which made these detectors very attractive in a wide variety of fields from fundamental research to applied sciences. Astronomy and astrophysics, dark matter, nuclear and particle physics, X-ray material analysis, thin films, semiconductor and superconductor applications, ion spectroscopy and biomolecule mass spectrometry are now major research areas. Technologies commonly exploited by LTD-18 scientists include cryogenics, cryo-electronics, thin-film deposition, superconductivity, nano- and micro- fabrication, signal read-out multiplexing, data acquisition and analysis.