How to save figures from a loop to current folder with specific names

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My Code shows 9 figures ( T=1:3 and b=1:3) in a loop and it saves in my current folder. But it saves as:

T1.pngT1
T1.pngT2
T1.pngT3
T2.pngT1
T2.pngT2
T2.pngT3... and so on

But I have 2 variables, so I want to to save them as:

T1b1
T1b2
T1b3
T2b1
T2b2
T2b3.... and so on

How can I do this?

clear all;
clf
n=100;
t0  = 0.5;
T = 1:3;
b = 1:3;
for v_T = 1:length(T)
    for v_b = 1:length(b)
        T_A = T(v_T)
        b_A = b(v_b)
        
        pdf2p            = @(x) (b_A/T_A).*(x/T_A).^(b_A-1).*(exp(-(x/T_A).^(b_A)));
        pdf3p            = @(x) (x>t0).*(b_A/(T_A-t0)).*((x-t0)/(T_A-t0)).^(b_A-1).*(exp(-((x-t0)/(T_A-t0)).^(b_A)));
       
        h= figure
        fplot(pdf2p,[0,10], 'LineWidth',2, "Color", 'b')
        hold on
        fplot(pdf3p,[0,10], 'LineWidth',2, "Color", 'r', 'LineStyle', '--')
     
        ax = gca;
        ax.XLim=[0,2.5];
        ax.YLim=[0,3];
        grid on; %Gitter anzeigen
        box on; %Rahmen zeigen
        title ('2- und 3 parametrische Dichtefunktion für n=10');
        xlabel('Lebensdauer t');
        ylabel('Dichtefunktion f(x)');
        legend(['T=' num2str(T_A), ', b=' num2str(b_A)], ['T=' num2str(T_A), ', b=' num2str(b_A), ', t0=' num2str(0.5)])
        saveas(h,sprintf('T%d.png',T_A, b_A))
    end
end