I'm not sure what "handshake traffic" you have in mind.
If you examine the CONNECT Tunnel using the TextView inspector, the Request Inspector will show you what parameters the client offered to Fiddler. The Response Inspector will show you what parameters Fiddler and the Server negotiated. (If you haven't enabled decryption, these inspectors will show you the Client->Server and Server-Client selections).
It is important to recognize that in HTTPS decryption mode, the handshakes will likely behave slightly differently without (due to the presence of Fiddler itself). If you want to see the handshake without any differences, disable decryption, or better yet, use NetMon or Wireshark (importing the .pcap or .cap into Fiddler if you'd like).
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