Dehydrogenation which removes two hydrogens between carbons 2 and 3.In this process acyl-CoA dehydrogenase is used as catalyst which makes it happen faster.
Hydration which adds water across the double bond.In this process enoyl-CoA is used as catalyst.
Dehydrogenation , which generates NADH.In this step 3-hydroxyacyl-CoA dehydrogenase is used as catalyst.
Thiolytic cleavage happens in end in which cleaves the terminal acetyl-CoA group and forms a new acyl-CoA which is two carbons shorter than the previous one.In this process beta-ketothiolase is used as catalyst