How to bind to parts

Good morning to everyone of the community.
I’m trying to bind together two surfaces (in red and in green in my attached file) of a ring, but I do not know how to do. Any help is very welcome, Thank you, MircoLOVE ONE 6.3dm (6.4 MB)

Hello - it is a bit messy, as you have it, but you can Cap both pieces and then BooleanUnion, but you’ll see the alignment is not good. My guess is, you want a smooth transition there, correct?

-Pascal

yes there must be a continuity among the two parts

thank you

Hello - see if this is the result you are looking for -

LOVE ONE 6.3dm (3.0 MB)

-Pascal