Conjugation among bacteria involve the passing of a plasmid from a host bacteria to a recipient bacteria. The first step of conjugation is the plasmid will replicate itself so that the host has two copies. The plasmid then codes for proteins to form the sex pili. The host bacteria then waits until a neighboring bacteria contacts it, at which point the pili will pass through the cell wall of the recipient bacteria. The replicated plasmid then goes from circular shape to linear so that it can transfer through the plasmid and enter the recipient cell.
Conjugation is then complete.