curl/docs/cmdline-opts/tlsv1.1.md

c	SPDX-License-Identifier	Long	Help	Protocols	Added	Category	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	tlsv1.1	Use TLSv1.1 or greater	TLS	7.34.0	tls	mutex	tlsv1.3 tls-max	--tlsv1.1 $URL

--tlsv1.1

Forces curl to use TLS version 1.1 or later when connecting to a remote TLS server.

In old versions of curl this option was documented to allow only TLS 1.1. That behavior was inconsistent depending on the TLS library. Use --tls-max if you want to set a maximum TLS version.