Question

The following code will create only one window at a time, the second window will only show when the first one is closed by the user.

How to show them at the same time with different titles?

nx.draw_networkx(..a..)
nx.draw_networkx(..b..)

Answer 1

It works the same as making other plots with Matplotlib.
Use the figure() command to switch to a new figure.

import networkx as nx
import matplotlib.pyplot as plt
    
G=nx.cycle_graph(4)
H=nx.path_graph(4)

plt.figure(1)
nx.draw(G)
plt.figure(2)
nx.draw(H)
    
plt.show()