0 . Symposium on Origin of Elements in the Solar System: Implication of Post-1957 Observations, 218th ACS National Meeting, New Orleans, LA, August 22-26, 1999 Measurement of the 44Ti Half-1ife and its Significance for Supernova* I. Ahmad, J. P. Greene Argonne National Laboratory, Argonne, IL 60439, USA W. Kutschera University of Vienna, Vienna, Austria M. Paul Hebrew University, Jerusalem, Israel ., Abstract: In 1998, we reported the three-laboratory measurement of the 44Ti half-life which was determined relative to the well known value (5.2714 & 0.0005 yr) of the GOCOhalf-life. We have continued the measurement at Argonne and Jerusalem and inclusion of data points for additional two years does not change our published value of 59.0 & 0.6 yr. -. m