Just use Yoast and add %%page%% to the Archive title, and it will add the page number, therefore removing the duplicate title tag issue as nothing will be the same, or
remember to also add %%sep%% so it adds a seperator, so example:
%%term_title%% %%sep%% %%page%% %%sep%% %%sitename%%
would appear as: category name – Page 2 of 50 – domain name
of course, domain name and the final separator are optional.
