As of Update 2.1.7, recycling no longer works, now we can ONLY hand-recycle things
This was caused because they removed the "recycling-or-hand-crafting" recipe category, since they now support multiple categories.
See more here:
https://forums.factorio.com/134095
This applies to Titanium, Lead, Tin and probably several other mods.
You can fix it by changing all instances of
if util.contains(entity.crafting_categories, "recycling-or-hand-crafting") then
to
if util.contains(entity.crafting_categories, "recycling") or util.contains(entity.crafting_categories, "hand-crafting") then
I've confirmed it with the 3 mods listed (they are the 3 I use), and they work perfectly with these changes.