The invention relates to a curable composition comprising: a) at least one polymer having at least one silicon-containing group of formula -Si(R1)k(Y)3-k as defined herein; b) at least one titanium complex of formula TiL(OR3)2 wherein each R3 is independently selected from a C1-20 alkyl or aryl which may optionally contain one or more heteroatoms, preferably selected from silicon, sulfur, nitrogenor oxygen atoms, wherein preferably R3 is selected from n-butyl or isopropyl, and L is a deprotonated, tridentate ligand, and c) optionally at least one compound which has a hydrolyzable silicon-containing group and a weight average molecular weight in the range of 100 to 1000 g/mol, preparations containing these compositions and use thereof.