Is it possible to transfer my web3name to another KILT identity?

No, your web3name is designed to be non-transferable as it is linked to your decentralized identifier (DID), which forms the core of your digital identity. If you wish to transfer your web3name to a different KILT DID, you could release it and then claim it on the other DID. However, there is a risk that someone else could claim the name during that process.