COMPTEL all-sky survey in Ti-44 line emission

The discovery by COMPTEL of the Ti-44 line emission at 1.16 MeV from the yo ungest known Galactic supernova remnant (SNR) Cas A has opened a new window for the investigation of SNR properties. This discovery also shows a way t hat could help to uncover missing young remnants of Galactic SNe that might have occurred some hundred years ago. Contrary to the situation at other w avelengths, in the gamma-ray band the Galaxy is almost transparent, so that otherwise obscured supernova remnants may be detectable up to A(v)similar to 10(3) in gamma-ray line emission. This is one of the direct ways to comp lement historical observations of Galactic SNe. Here we present preliminary results of the 6 year Ti-44 line emission survey performed by COMPTEL on-b oard the Compton Gamma Ray Observatory (CGRO).