https://www.austintexas.gov/department/open-carry
In January 2016, carrying a handgun openly became legal in Texas.
This law modified the previous handgun license law by eliminating the requirement that licensed handguns be carried in a concealed manner.
This means that somebody with a handgun license may choose to conceal it under clothing or wear it in a holster visible to others.
The new version does not require a license. But there are stipulations.