You can make title as ylabel and achieve what you want..
x = linspace(0,10);
y1 = sin(x);
y2 = sin(5*x);
figure
subplot(2,1,1);
plot(x,y1)
ylabel('title1')
set(get(gca,'YLabel'),'Rotation',0)
subplot(2,1,2);
plot(x,y2)
ylabel('title2')
set(get(gca,'YLabel'),'Rotation',0)
