It will match nicely. At least I think so.
The Natural Titanium finish on my 15 Pro Max matches with the matte brushed finish on my Link Bracelet’s from Apple (I have 2) and the shiny Milanese Loop.
However, my biggest concern is band compatibility. All of my bands are 38mm and the smalles Series 10 is 42mm. Hopefully they will work.
Here’s some pictures comparing the SS Watch & bands against the Natural Titanium finish on the iPhone